Release Notes

3.0.0

Preview

Build 2824 (Jul 28, 2026)

Bug Fixes

Fixed: An object that became ownerless while ownership requests were still queued left those requesters waiting indefinitely — pending requesters are now denied when the owner goes away, and a direct state-channel claim of an ownerless object is blocked while forwarded requests are still pending
Fixed: A race where releasing ownership could invalidate an already-approved ownership handoff — grants that were in flight when the object went ownerless are now validated against a snapshot of the requesters taken at release, so the approved requester still receives the object
Fixed: Releasing an owned Dynamic-mode object fired ObjectOwnerChanged twice, with the first firing incorrectly reporting the releasing client as still the owner — the event now fires once with the actual post-release owner
Fixed: Sconnecting from inside an RPC could previously have client iterating invalid state post disconnect, client will now immediatly stop iterating channels and boot out of the update loop if this happens

Build 2784 (Jul 17, 2026)

Breaking Changes

Removed ServerType, all connections are always to the name server now
Removed WebFlags
Removed WebRTC

Bug Fixes

Fixed: Multiple Bugs were fixed
Fixed: Hardening against buffer overflows was added

Build 2597 (Jul 01, 2026)

Breaking Changes

Namespace PhotonCommon::detail was renamed to PhotonCommon::Detail
PhotonCommon::detail::is_result was renamed to PhotonCommon::Detail::IsResult
PhotonCommon::detail::is_task was renamed to PhotonCommon::Detail::IsTask
PhotonCommon::detail::unwrap_task was renamed to PhotonCommon::Detail::UnwrapTask
FusionCore::MasterClientPlayerId was renamed to FusionCore::MASTER_CLIENT_PLAYER_ID
FusionCore::PluginPlayerId was renamed to FusionCore::PLUGIN_PLAYER_ID
FusionCore::ObjectOwnerPlayerId was renamed to FusionCore::OBJECT_OWNED_PLAYER_ID
FusionCore::ObjectId::WordSize was renamed to FusionCore::ObjectId::WORD_SIZE
FusionCore::RPC_InternalMinId was renamed to FusionCore::RPC_INTERNAL_MIN_ID
FusionCore::RPC_InternalMaxId was renamed to FusionCore::RPC_INTERNAL_MAX_ID
FusionCore::RPC_InternalMapChange was renamed to FusionCore::RPC_INTERNAL_MAP_CHANGE
FusionCore::RPC_InternalObjectPriority was renamed to FusionCore::RPC_INTERNAL_OBJECT_PRIORITY
FusionCore::RPC_InternalMapAdd was renamed to FusionCore::RPC_INTERNAL_MAP_ADD
FusionCore::RPC_InternalMapRemove was renamed to FusionCore::RPC_INTERNAL_MAP_REMOVE
FusionCore::RPC_InternalOwnershipRequest was renamed to FusionCore::RPC_INTERNAL_OWNERSHIP_REQUEST
FusionCore::RPC_InternalRejectSubObject was renamed to FusionCore::RPC_INTERNAL_REJECT_SUB_OBJECT
FusionCore::RPC_InternalDestroyedMapActors was renamed to FusionCore::RPC_INTERNAL_DESTROYED_MAP_ACTORS
FusionCore::RPC_InternalForceDestroyObject was renamed to FusionCore::RPC_INTERNAL_FORCE_DESTROY_OBJECT
FusionCore::RPC_InternalForceAliveObject was renamed to FusionCore::RPC_INTERNAL_FORCE_ALIVE_OBJECT
FusionCore::RPC_InternalInput was renamed to FusionCore::RPC_INTERNAL_INPUT
FusionCore::RPC_InternalPlayerInterest was renamed to FusionCore::RPC_INTERNAL_PLAYER_INTEREST
FusionCore::RPC_InternalOwnershipResponse was renamed to FusionCore::RPC_INTERNAL_OWNERSHIP_RESPONSE
FusionCore::Object::ExtraTailWords was renamed to FusionCore::Object::EXTRA_TAIL_WORDS
FusionCore::WordData::offset was renamed to FusionCore::WordData::Offset
FusionCore::WordData::value was renamed to FusionCore::WordData::Value
FusionCore::SdkVersion::_packed was renamed to FusionCore::SdkVersion::Packed
FusionCore::WriteFlags::buffer was renamed to FusionCore::WriteFlags::Buffer
FusionCore::WriteFlags::offset was renamed to FusionCore::WriteFlags::Offset
FusionCore::Notify::FragmentHeader::_reserved_1 was renamed to FusionCore::Notify::FragmentHeader::Reserved1
FusionCore::FusionRoomProperties::Config was renamed to FusionCore::FusionRoomProperties::CONFIG
FusionCore::FusionRoomProperties::MapData was renamed to FusionCore::FusionRoomProperties::MAP_DATA
FusionCore::FusionRoomProperties::SdkVersion was renamed to FusionCore::FusionRoomProperties::SDK_VERSION
FusionCore::FusionConfigDefaults::Json was renamed to FusionCore::FusionConfigDefaults::JSON
PhotonCommon::Error::code was renamed to PhotonCommon::Error::Code
PhotonCommon::Error::message was renamed to PhotonCommon::Error::Message
PhotonCommon::detail::is_result_v was renamed to PhotonCommon::Detail::IS_RESULT_V
PhotonCommon::detail::is_task_v was renamed to PhotonCommon::Detail::IS_TASK_V
PhotonCommon::Task::promise_type::result was renamed to PhotonCommon::Task::promise_type::Result
PhotonCommon::Task::promise_type::exception was renamed to PhotonCommon::Task::promise_type::Exception
PhotonCommon::Task::promise_type::continuation was renamed to PhotonCommon::Task::promise_type::Continuation
PhotonCommon::Task::promise_type::detached was renamed to PhotonCommon::Task::promise_type::Detached
PhotonMatchmaking::AuthenticationValues::userId was renamed to PhotonMatchmaking::AuthenticationValues::UserId
PhotonMatchmaking::AuthenticationValues::type was renamed to PhotonMatchmaking::AuthenticationValues::Type
PhotonMatchmaking::AuthenticationValues::parameters was renamed to PhotonMatchmaking::AuthenticationValues::Parameters
PhotonMatchmaking::AuthenticationValues::data was renamed to PhotonMatchmaking::AuthenticationValues::Data
PhotonMatchmaking::ClientConstructOptions::appId was renamed to PhotonMatchmaking::ClientConstructOptions::AppId
PhotonMatchmaking::ClientConstructOptions::appVersion was renamed to PhotonMatchmaking::ClientConstructOptions::AppVersion
PhotonMatchmaking::ClientConstructOptions::protocol was renamed to PhotonMatchmaking::ClientConstructOptions::Protocol
PhotonMatchmaking::ClientConstructOptions::useAlternativePorts was renamed to PhotonMatchmaking::ClientConstructOptions::UseAlternativePorts
PhotonMatchmaking::ClientConstructOptions::regionSelectionMode was renamed to PhotonMatchmaking::ClientConstructOptions::RegionSelectionMode
PhotonMatchmaking::ClientConstructOptions::autoLobbyStats was renamed to PhotonMatchmaking::ClientConstructOptions::AutoLobbyStats
PhotonMatchmaking::ClientConstructOptions::serialization was renamed to PhotonMatchmaking::ClientConstructOptions::Serialization
PhotonMatchmaking::ClientConstructOptions::disconnectTimeoutMs was renamed to PhotonMatchmaking::ClientConstructOptions::DisconnectTimeoutMs
PhotonMatchmaking::ClientConstructOptions::pingIntervalMs was renamed to PhotonMatchmaking::ClientConstructOptions::PingIntervalMs
PhotonMatchmaking::ClientConstructOptions::enableCrc was renamed to PhotonMatchmaking::ClientConstructOptions::EnableCrc
PhotonMatchmaking::ClientConstructOptions::sentCountAllowance was renamed to PhotonMatchmaking::ClientConstructOptions::SentCountAllowance
PhotonMatchmaking::ClientConstructOptions::quickResendAttempts was renamed to PhotonMatchmaking::ClientConstructOptions::QuickResendAttempts
PhotonMatchmaking::ClientConstructOptions::limitOfUnreliableCommands was renamed to PhotonMatchmaking::ClientConstructOptions::LimitOfUnreliableCommands
PhotonMatchmaking::ConnectOptions::auth was renamed to PhotonMatchmaking::ConnectOptions::Auth
PhotonMatchmaking::ConnectOptions::username was renamed to PhotonMatchmaking::ConnectOptions::Username
PhotonMatchmaking::ConnectOptions::serverType was renamed to PhotonMatchmaking::ConnectOptions::ServerType
PhotonMatchmaking::ConnectOptions::serverAddress was renamed to PhotonMatchmaking::ConnectOptions::ServerAddress
PhotonMatchmaking::ConnectOptions::tryUseDatagramEncryption was renamed to PhotonMatchmaking::ConnectOptions::TryUseDatagramEncryption
PhotonMatchmaking::ConnectOptions::useBackgroundSendReceiveThread was renamed to PhotonMatchmaking::ConnectOptions::UseBackgroundSendReceiveThread
PhotonMatchmaking::CreateRoomOptions::isVisible was renamed to PhotonMatchmaking::CreateRoomOptions::IsVisible
PhotonMatchmaking::CreateRoomOptions::isOpen was renamed to PhotonMatchmaking::CreateRoomOptions::IsOpen
PhotonMatchmaking::CreateRoomOptions::maxPlayers was renamed to PhotonMatchmaking::CreateRoomOptions::MaxPlayers
PhotonMatchmaking::CreateRoomOptions::customProperties was renamed to PhotonMatchmaking::CreateRoomOptions::CustomProperties
PhotonMatchmaking::CreateRoomOptions::lobbyProperties was renamed to PhotonMatchmaking::CreateRoomOptions::LobbyProperties
PhotonMatchmaking::CreateRoomOptions::lobbyName was renamed to PhotonMatchmaking::CreateRoomOptions::LobbyName
PhotonMatchmaking::CreateRoomOptions::lobbyType was renamed to PhotonMatchmaking::CreateRoomOptions::LobbyType
PhotonMatchmaking::CreateRoomOptions::playerTtlMs was renamed to PhotonMatchmaking::CreateRoomOptions::PlayerTtlMs
PhotonMatchmaking::CreateRoomOptions::emptyRoomTtlMs was renamed to PhotonMatchmaking::CreateRoomOptions::EmptyRoomTtlMs
PhotonMatchmaking::CreateRoomOptions::suppressRoomEvents was renamed to PhotonMatchmaking::CreateRoomOptions::SuppressRoomEvents
PhotonMatchmaking::CreateRoomOptions::publishUserId was renamed to PhotonMatchmaking::CreateRoomOptions::PublishUserId
PhotonMatchmaking::CreateRoomOptions::directMode was renamed to PhotonMatchmaking::CreateRoomOptions::DirectMode
PhotonMatchmaking::CreateRoomOptions::plugins was renamed to PhotonMatchmaking::CreateRoomOptions::Plugins
PhotonMatchmaking::CreateRoomOptions::expectedUsers was renamed to PhotonMatchmaking::CreateRoomOptions::ExpectedUsers
PhotonMatchmaking::DirectMessageOptions::targetPlayers was renamed to PhotonMatchmaking::DirectMessageOptions::TargetPlayers
PhotonMatchmaking::DirectMessageOptions::receiverGroup was renamed to PhotonMatchmaking::DirectMessageOptions::ReceiverGroup
PhotonMatchmaking::DirectMessageOptions::fallbackRelay was renamed to PhotonMatchmaking::DirectMessageOptions::FallbackRelay
PhotonMatchmaking::EventOptions::reliable was renamed to PhotonMatchmaking::EventOptions::Reliable
PhotonMatchmaking::EventOptions::channel was renamed to PhotonMatchmaking::EventOptions::Channel
PhotonMatchmaking::EventOptions::receiverGroup was renamed to PhotonMatchmaking::EventOptions::ReceiverGroup
PhotonMatchmaking::EventOptions::targetPlayers was renamed to PhotonMatchmaking::EventOptions::TargetPlayers
PhotonMatchmaking::EventOptions::interestGroup was renamed to PhotonMatchmaking::EventOptions::InterestGroup
PhotonMatchmaking::EventOptions::caching was renamed to PhotonMatchmaking::EventOptions::Caching
PhotonMatchmaking::EventOptions::encrypt was renamed to PhotonMatchmaking::EventOptions::Encrypt
PhotonMatchmaking::EventOptions::cacheSliceIndex was renamed to PhotonMatchmaking::EventOptions::CacheSliceIndex
PhotonMatchmaking::EventOptions::webFlags was renamed to PhotonMatchmaking::EventOptions::WebFlags
PhotonMatchmaking::Friend
PhotonMatchmaking::JoinRoomOptions::rejoin was renamed to PhotonMatchmaking::JoinRoomOptions::Rejoin
PhotonMatchmaking::JoinRoomOptions::cacheSliceIndex was renamed to PhotonMatchmaking::JoinRoomOptions::CacheSliceIndex
PhotonMatchmaking::JoinRoomOptions::expectedUsers was renamed to PhotonMatchmaking::JoinRoomOptions::ExpectedUsers
PhotonMatchmaking::LobbyStats::name was renamed to PhotonMatchmaking::LobbyStats::Name
PhotonMatchmaking::LobbyStats::type was renamed to PhotonMatchmaking::LobbyStats::Type
PhotonMatchmaking::LobbyStats::peerCount was renamed to PhotonMatchmaking::LobbyStats::PeerCount
PhotonMatchmaking::LobbyStats::roomCount was renamed to PhotonMatchmaking::LobbyStats::RoomCount
PhotonMatchmaking::MatchmakingOptions::filter was renamed to PhotonMatchmaking::MatchmakingOptions::Filter
PhotonMatchmaking::MatchmakingOptions::maxPlayers was renamed to PhotonMatchmaking::MatchmakingOptions::MaxPlayers
PhotonMatchmaking::MatchmakingOptions::mode was renamed to PhotonMatchmaking::MatchmakingOptions::Mode
PhotonMatchmaking::MatchmakingOptions::lobbyName was renamed to PhotonMatchmaking::MatchmakingOptions::LobbyName
PhotonMatchmaking::MatchmakingOptions::lobbyType was renamed to PhotonMatchmaking::MatchmakingOptions::LobbyType
PhotonMatchmaking::MatchmakingOptions::sqlFilter was renamed to PhotonMatchmaking::MatchmakingOptions::SqlFilter
PhotonMatchmaking::MatchmakingOptions::expectedUsers was renamed to PhotonMatchmaking::MatchmakingOptions::ExpectedUsers
PhotonMatchmaking::NetworkStats::roundTripTimeMs was renamed to PhotonMatchmaking::NetworkStats::RoundTripTimeMs
PhotonMatchmaking::NetworkStats::rttVarianceMs was renamed to PhotonMatchmaking::NetworkStats::RttVarianceMs
PhotonMatchmaking::NetworkStats::bytesIn was renamed to PhotonMatchmaking::NetworkStats::BytesIn
PhotonMatchmaking::NetworkStats::bytesOut was renamed to PhotonMatchmaking::NetworkStats::BytesOut
PhotonMatchmaking::NetworkStats::bytesCurrentDispatch was renamed to PhotonMatchmaking::NetworkStats::BytesCurrentDispatch
PhotonMatchmaking::NetworkStats::bytesLastOperation was renamed to PhotonMatchmaking::NetworkStats::BytesLastOperation
PhotonMatchmaking::NetworkStats::queuedIncomingCommands was renamed to PhotonMatchmaking::NetworkStats::QueuedIncomingCommands
PhotonMatchmaking::NetworkStats::queuedOutgoingCommands was renamed to PhotonMatchmaking::NetworkStats::QueuedOutgoingCommands
PhotonMatchmaking::NetworkStats::incomingReliableCommands was renamed to PhotonMatchmaking::NetworkStats::IncomingReliableCommands
PhotonMatchmaking::NetworkStats::resentReliableCommands was renamed to PhotonMatchmaking::NetworkStats::ResentReliableCommands
PhotonMatchmaking::NetworkStats::playersInGame was renamed to PhotonMatchmaking::NetworkStats::PlayersInGame
PhotonMatchmaking::NetworkStats::gamesRunning was renamed to PhotonMatchmaking::NetworkStats::GamesRunning
PhotonMatchmaking::NetworkStats::playersOnline was renamed to PhotonMatchmaking::NetworkStats::PlayersOnline
PhotonMatchmaking::NetworkStats::serverTimeOffsetMs was renamed to PhotonMatchmaking::NetworkStats::ServerTimeOffsetMs
PhotonMatchmaking::NetworkStats::serverTimeMs was renamed to PhotonMatchmaking::NetworkStats::ServerTimeMs
PhotonMatchmaking::NetworkStats::timestampLastReceive was renamed to PhotonMatchmaking::NetworkStats::TimestampLastReceive
PhotonMatchmaking::NetworkStats::packetLossByCrc was renamed to PhotonMatchmaking::NetworkStats::PacketLossByCrc
PhotonMatchmaking::NetworkStats::sentCountAllowance was renamed to PhotonMatchmaking::NetworkStats::SentCountAllowance
PhotonMatchmaking::NetworkStats::encryptionAvailable was renamed to PhotonMatchmaking::NetworkStats::EncryptionAvailable
PhotonMatchmaking::NetworkStats::payloadEncryptionAvailable was renamed to PhotonMatchmaking::NetworkStats::PayloadEncryptionAvailable
PhotonMatchmaking::NetworkStats::peerId was renamed to PhotonMatchmaking::NetworkStats::PeerId
PhotonMatchmaking::NetworkStats::disconnectTimeoutMs was renamed to PhotonMatchmaking::NetworkStats::DisconnectTimeoutMs
PhotonMatchmaking::NetworkStats::pingIntervalMs was renamed to PhotonMatchmaking::NetworkStats::PingIntervalMs
PhotonMatchmaking::NetworkStats::trafficStatsElapsedMs was renamed to PhotonMatchmaking::NetworkStats::TrafficStatsElapsedMs
PhotonMatchmaking::NetworkStats::masterServerAddress was renamed to PhotonMatchmaking::NetworkStats::MasterServerAddress
PhotonMatchmaking::NetworkStats::channelCountUserChannels was renamed to PhotonMatchmaking::NetworkStats::ChannelCountUserChannels
PhotonMatchmaking::NetworkStats::serializationProtocol was renamed to PhotonMatchmaking::NetworkStats::SerializationProtocol
PhotonMatchmaking::NetworkStats::peerCount was renamed to PhotonMatchmaking::NetworkStats::PeerCount
PhotonMatchmaking::PlayerView::number was renamed to PhotonMatchmaking::PlayerView::Number
PhotonMatchmaking::PlayerView::name was renamed to PhotonMatchmaking::PlayerView::Name
PhotonMatchmaking::PlayerView::userId was renamed to PhotonMatchmaking::PlayerView::UserId
PhotonMatchmaking::PlayerView::customProperties was renamed to PhotonMatchmaking::PlayerView::CustomProperties
PhotonMatchmaking::PlayerView::isInactive was renamed to PhotonMatchmaking::PlayerView::IsInactive
PhotonMatchmaking::PlayerView::isMasterClient was renamed to PhotonMatchmaking::PlayerView::IsMasterClient
PhotonMatchmaking::Region
PhotonMatchmaking::RoomListing::name was renamed to PhotonMatchmaking::RoomListing::Name
PhotonMatchmaking::RoomListing::playerCount was renamed to PhotonMatchmaking::RoomListing::PlayerCount
PhotonMatchmaking::RoomListing::maxPlayers was renamed to PhotonMatchmaking::RoomListing::MaxPlayers
PhotonMatchmaking::RoomListing::isOpen was renamed to PhotonMatchmaking::RoomListing::IsOpen
PhotonMatchmaking::RoomListing::directMode was renamed to PhotonMatchmaking::RoomListing::DirectMode
PhotonMatchmaking::RoomListing::customProperties was renamed to PhotonMatchmaking::RoomListing::CustomProperties
PhotonMatchmaking::TrafficStats::packageHeaderSize was renamed to PhotonMatchmaking::TrafficStats::PackageHeaderSize
PhotonMatchmaking::TrafficStats::reliableCommandCount was renamed to PhotonMatchmaking::TrafficStats::ReliableCommandCount
PhotonMatchmaking::TrafficStats::unreliableCommandCount was renamed to PhotonMatchmaking::TrafficStats::UnreliableCommandCount
PhotonMatchmaking::TrafficStats::fragmentCommandCount was renamed to PhotonMatchmaking::TrafficStats::FragmentCommandCount
PhotonMatchmaking::TrafficStats::controlCommandCount was renamed to PhotonMatchmaking::TrafficStats::ControlCommandCount
PhotonMatchmaking::TrafficStats::totalPacketCount was renamed to PhotonMatchmaking::TrafficStats::TotalPacketCount
PhotonMatchmaking::TrafficStats::totalCommandsInPackets was renamed to PhotonMatchmaking::TrafficStats::TotalCommandsInPackets
PhotonMatchmaking::TrafficStats::reliableCommandBytes was renamed to PhotonMatchmaking::TrafficStats::ReliableCommandBytes
PhotonMatchmaking::TrafficStats::unreliableCommandBytes was renamed to PhotonMatchmaking::TrafficStats::UnreliableCommandBytes
PhotonMatchmaking::TrafficStats::fragmentCommandBytes was renamed to PhotonMatchmaking::TrafficStats::FragmentCommandBytes
PhotonMatchmaking::TrafficStats::controlCommandBytes was renamed to PhotonMatchmaking::TrafficStats::ControlCommandBytes
PhotonMatchmaking::TrafficStats::totalCommandCount was renamed to PhotonMatchmaking::TrafficStats::TotalCommandCount
PhotonMatchmaking::TrafficStats::totalCommandBytes was renamed to PhotonMatchmaking::TrafficStats::TotalCommandBytes
PhotonMatchmaking::TrafficStats::totalPacketBytes was renamed to PhotonMatchmaking::TrafficStats::TotalPacketBytes
PhotonMatchmaking::TrafficStats::timestampOfLastAck was renamed to PhotonMatchmaking::TrafficStats::TimestampOfLastAck
PhotonMatchmaking::TrafficStats::timestampOfLastReliableCommand was renamed to PhotonMatchmaking::TrafficStats::TimestampOfLastReliableCommand
PhotonMatchmaking::TrafficStatsGameLevel::operationByteCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::OperationByteCount
PhotonMatchmaking::TrafficStatsGameLevel::operationCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::OperationCount
PhotonMatchmaking::TrafficStatsGameLevel::resultByteCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::ResultByteCount
PhotonMatchmaking::TrafficStatsGameLevel::resultCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::ResultCount
PhotonMatchmaking::TrafficStatsGameLevel::eventByteCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::EventByteCount
PhotonMatchmaking::TrafficStatsGameLevel::eventCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::EventCount
PhotonMatchmaking::TrafficStatsGameLevel::longestOpResponseCallbackMs was renamed to PhotonMatchmaking::TrafficStatsGameLevel::LongestOpResponseCallbackMs
PhotonMatchmaking::TrafficStatsGameLevel::longestOpResponseCallbackOpCode was renamed to PhotonMatchmaking::TrafficStatsGameLevel::LongestOpResponseCallbackOpCode
PhotonMatchmaking::TrafficStatsGameLevel::longestEventCallbackMs was renamed to PhotonMatchmaking::TrafficStatsGameLevel::LongestEventCallbackMs
PhotonMatchmaking::TrafficStatsGameLevel::longestEventCallbackCode was renamed to PhotonMatchmaking::TrafficStatsGameLevel::LongestEventCallbackCode
PhotonMatchmaking::TrafficStatsGameLevel::longestDeltaBetweenDispatchingMs was renamed to PhotonMatchmaking::TrafficStatsGameLevel::LongestDeltaBetweenDispatchingMs
PhotonMatchmaking::TrafficStatsGameLevel::longestDeltaBetweenSendingMs was renamed to PhotonMatchmaking::TrafficStatsGameLevel::LongestDeltaBetweenSendingMs
PhotonMatchmaking::TrafficStatsGameLevel::dispatchIncomingCommandsCalls was renamed to PhotonMatchmaking::TrafficStatsGameLevel::DispatchIncomingCommandsCalls
PhotonMatchmaking::TrafficStatsGameLevel::sendOutgoingCommandsCalls was renamed to PhotonMatchmaking::TrafficStatsGameLevel::SendOutgoingCommandsCalls
PhotonMatchmaking::TrafficStatsGameLevel::totalByteCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::TotalByteCount
PhotonMatchmaking::TrafficStatsGameLevel::totalMessageCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::TotalMessageCount
PhotonMatchmaking::TrafficStatsGameLevel::totalIncomingByteCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::TotalIncomingByteCount
PhotonMatchmaking::TrafficStatsGameLevel::totalIncomingMessageCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::TotalIncomingMessageCount
PhotonMatchmaking::TrafficStatsGameLevel::totalOutgoingByteCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::TotalOutgoingByteCount
PhotonMatchmaking::TrafficStatsGameLevel::totalOutgoingMessageCount was renamed to PhotonMatchmaking::TrafficStatsGameLevel::TotalOutgoingMessageCount
PhotonMatchmaking::WebFlags::httpForward was renamed to PhotonMatchmaking::WebFlags::HttpForward
PhotonMatchmaking::WebFlags::sendAuthCookie was renamed to PhotonMatchmaking::WebFlags::SendAuthCookie
PhotonMatchmaking::WebFlags::sendSync was renamed to PhotonMatchmaking::WebFlags::SendSync
PhotonMatchmaking::WebFlags::sendState was renamed to PhotonMatchmaking::WebFlags::SendState
PhotonMatchmaking::WebRpcResponse::resultCode was renamed to PhotonMatchmaking::WebRpcResponse::ResultCode
PhotonMatchmaking::WebRpcResponse::errorString was renamed to PhotonMatchmaking::WebRpcResponse::ErrorString
PhotonMatchmaking::WebRpcResponse::uriPath was renamed to PhotonMatchmaking::WebRpcResponse::UriPath
PhotonMatchmaking::WebRpcResponse::returnData was renamed to PhotonMatchmaking::WebRpcResponse::ReturnData
Misc.h CRC64() was renamed to Crc64, detail::pow10 was renamed to Detail::Pow10, detail::pow10table was renamed to Detail::POW_10_TABLE
Methods in StringHeap.h and public members were renamed to PascalCase
PhotonCommon::to_string_type was renamed to PhotonCommon::ToStringType

Build 2363 (Jun 10, 2026)

Breaking Changes

The OnForceDisconnect callback now returns a PhotonCommon::StringType instead of a std::string and also returns a reason enum

Build 1969 (May 07, 2026)

Breaking Changes

OnOwnershipRequest signature: bool(ObjectRoot*, PlayerId) -> void(ObjectRoot*, PlayerId). No longer a vote; owner replies asynchronously via Client::RespondToOwnershipRequest(obj, granted)
C API: obj_give_away_owner → obj_respond_to_ownership_request(client, obj, granted). C#: Object.GiveAwayOwner -> Object.RespondToOwnershipRequest
Removed Client::SetGiveAwayOwner and Client::RejectOwnershipRequest
Removed OnObjectOwnerAssigned — use OnObjectOwnerChanged and compare against LocalPlayerId()

Bug Fixes

Fixed: OnObjectOwnerChanged now also fires on first owner assignment during create
Fixed: Request cooldown only bumps when the owner is reachable
Fixed: Other consistency issues with ownership change behaviour

Build 1923 (May 05, 2026)

What's New

The former SharedClient SDK is renamed to Fusion Core. Almost every public surface changed: the SharedMode namespace becomes FusionCore, the single Fusion static library is split into PhotonCommon → PhotonMatchmaking → FusionCore, and a new optional FusionCAPI MODULE exposes a flat C ABI for engine bindings. The single-scene model is replaced by a multi-map session, PlayerPredicted ownership and SimulationMode::Authority enable server-authoritative prediction with input replay, and RealtimeClient gains a full Task<Result<T>> async API. C++20 is now required

Changes

Changed: namespace SharedMode::* → FusionCore::*. SharedModeCompat.h is included from every public header for partial source-compat
Changed: single Fusion static library replaced by PhotonCommon → PhotonMatchmaking → FusionCore chain
Added: optional FusionCAPI MODULE library exposing a flat C ABI — 235+ functions, opaque handles, polled event queue, blittable FusionEvent (28 B), unified FusionEventType enum (0–18 client / 100–116 realtime async / 200–220 realtime broadcasters), blittable FusionNetworkStats / FusionTrafficStats / FusionTrafficStatsGameLevel / FusionEMAReport. Header: FusionCore/libs/fusion_c_api/include/FusionCAPI.h
Added: cache flag FUSION_BUILD_CAPI (ON for standalone, OFF for engine presets, always OFF on WASM, STATIC on iOS with FUSION_CAPI_STATIC define)
Changed: library output filenames now embed the MSVC runtime suffix _mt / _md (e.g. fusion_windows_x64_release_mt.lib)
Added: cache var FUSION_MSVC_RUNTIME_LIBRARY (MultiThreaded / MultiThreadedDLL) drives the suffix and prebuilt PhotonRealtime variant filtering
Changed: CMake presets split across CommonConfigurePresets.json, CommonBuildPresets.json, PlatformPresets.json, StandalonePresets.json, UnrealPresets.json, GodotPresets.json, TestPresets.json. Configure presets named <platform>-<arch>-<engine>[-<runtime>], build presets <platform>-<engine>[-<runtime>]-{debug,release}
Changed: C++ standard bumped to C++20 (required for Task<T> coroutines)
Changed: CMake minimum bumped to 3.31
Changed: Version.h is generated from Version.h.in at configure time using version.txt
Removed: Client::ChangeScene(index, sequence, data) (single-scene model)
Added: Client::MapChange(data) returning Map, plus MapAdd(data), MapRemove(map), MapIsValid(map) and GetMaps() for additive multi-map sessions
Changed: Client::CreateSceneObject renamed to Client::CreateMapObject. Takes Map instead of uint32_t scene and uint32_t engineFlags instead of ObjectSpecialFlags
Changed: DestroyModes::SceneChange renamed to DestroyModes::MapChange
Changed: RPC_InternalSceneChange renamed to RPC_InternalMapChange
Added: RPC_InternalMapAdd, RPC_InternalMapRemove, RPC_InternalOwnershipRequest, RPC_InternalRejectSubObject, RPC_InternalDestroyedMapActors, RPC_InternalForceDestroyObject, RPC_InternalForceAliveObject, RPC_InternalInput, RPC_InternalPlayerInterest, RPC_InternalOwnershipResponse (12 reserved IDs total in 1..1023)
Removed: OnSceneChange(index, sequence, Data&) broadcaster
Added: OnMapChange(unordered_map<Map, Data>&, bool initial) broadcaster
Changed: room property fusion_scene_data renamed to fusion_map_data (now base64-encoded FusionMapStateBuilder payload)
Removed: public ObjectRoot::Scene field. Use ObjectRoot::GetMap() returning Id.Map
Changed: PlayerId narrowed from uint32_t to uint16_t. Sentinels: MasterClientPlayerId = 0xFFFF, PluginPlayerId = 0xFFFE, ObjectOwnerPlayerId = 0xFFFD
Added: Map typedef (uint16_t)
Changed: ObjectId is now {Origin, Map, Counter} (still 8 bytes — Origin@0 16-bit, Map@2 16-bit, Counter@4 32-bit)
Changed: ObjectId(packed) decoding is now Origin = packed & UINT16_MAX; Map = (packed >> 16) & UINT16_MAX; Counter = packed >> 32
Changed: Client::GetNewObjectId() is now Client::GetNewObjectId(Map map)
Changed: ObjectTail grew from 24 bytes to 72 bytes. Added Reserved[8], PredictingPlayer, RejectedSequence, InputSequence, InputTime. Renamed SendRate → RoomSendRate
Changed: Object::ExtraTailWords is now 18 (was 6)
Added: ObjectOwnerModes::PlayerPredicted = 5
Added: enum class SimulationMode { Shared = 0, Authority = 1 }
Changed: RpcFlags reworked from a struct (uint32_t _value) into an enum class with bitwise operators and a HasFlag(flags, flag) helper
Added: RpcFlags::IncorrectTargetForward, DontReplyWithResult, MapIncorrect, MaxDeliveryAttemptsReached, plus ErrorFlags aggregate
Removed: Rpc::TargetComponent (uint16_t) field
Removed: Rpc::DescriptorTypeHash (uint64_t) field. Routing now uses (Id, EventHash) only
Added: Rpc::Sequence (uint64_t) and Rpc::DeliveryAttempts (uint32_t)
Removed: DescriptorTypeHash parameter from Client::CreateUserRpc. New signature: (id, targetPlayer, targetObject, EventHash, data, dataLength)
Changed: Client::SendUserRpc now takes Rpc& (non-const) — the SDK assigns Sequence in place
Changed: Client::SetSendRate(obj, rate) renamed to SetRoomSendRate(obj, rate). ResetSendRate(obj) renamed to ResetRoomSendRate(obj)
Added: Client::ResetLocalSendRate(obj) (counterpart to existing SetLocalSendRate)
Removed: Client::ClearAllKeys, ClearAreaKeys, ClearUserKeys, SetAreaKeys, AddUserKey, RemoveUserKey, GetAllAreaKeys, GetAllUserKeys, GetInterestKeys. Replaced by InterestKeySet
Added: Client::GetLocalInterestKeys() / GetPlayerInterestKeys(player) returning InterestKeySet& (with Set, Remove, Clear, ClearAreaKeys, ClearUserKeys, SetAreaKeys, AddUserKey, RemoveUserKey, GetAllAreaKeys, GetAllUserKeys, IsDirty, ClearDirty and area/user encoding in the low bit)
Changed: Client::Start() now returns bool (was void) — validates fusion_config and fusion_map_data room properties and returns false on precondition failure
Added: Client::RefreshRoomCache()
Added: Client::SetDynamicOwnerCooldown(seconds) / GetDynamicOwnerCooldown() (default 1.0/3 seconds, configurable at runtime)
Removed: Object::DynamicOwnerCooldownTime static constant
Added: Client::SetAuthoritySendRate(rate) / GetAuthoritySendRate() (default 30 Hz)
Added: prediction APIs Client::GetSimulationMode(), GetPredictingPlayer(obj), SetPredictingPlayer(obj, player), IsPredictingPlayer(obj), HasInputAuthority(obj), GetInputSequence(obj), SetInputSequence(obj, seq), NextInputSequence()
Added: ObjectRoot::QueueInput(dt, payload), ExecuteInputs(dt), GetInputQueueCount(), GetInputQueueDeltaTime(), GetInputTime()
Added: Client::SetGiveAwayOwner(obj, player) to initiate explicit ownership transfers
Added: Client::RejectOwnershipRequest(obj) to deny inbound OnOwnershipRequest requests
Changed: OnOwnerWasGiven renamed to OnObjectOwnerAssigned
Changed: OnObjectPredictionOverride renamed to OnPredictionOverride
Added: broadcasters OnRpcError, OnObjectForceAlive, OnSubObjectForceAlive, OnInput, OnPredictionReset, OnOwnershipRequest (returns bool, aggregate any-true grants), OnOwnershipResponse
Changed: OnDestroyedMapActor(uint32_t, ObjectId) simplified to OnDestroyedMapActor(ObjectId) (first parameter dropped)
Removed: public Object::Header field
Added: Object::EngineBlob (Data), Object::EngineHash (uint64_t), Object::EngineFlags (uint32_t) replacing Header
Removed: enum class ObjectSpecialFlags. engineFlags (uint32_t) is supplied to Create* calls and stored on the base class
Removed: Object::Status field and OBJECT_STATUS_NEW / OBJECT_STATUS_PENDING / OBJECT_STATUS_CREATED constants
Added: ObjectRoot::IsReady() and GetHasReceivedState() lifecycle queries
Removed: Object::GetBytesSendLastTick, GetBytesReceivedLastTick, ConsumeBytesSendLastTick, ConsumeBytesReceivedLastTick, ResetReceivedBytes
Added: EMA-based stats Object::GetSendReport() / GetRecvReport(), ObjectRoot::GetCombinedSendReport() / GetCombinedRecvReport(), Client::GetSendReport / GetRecvReport / GetSendStateReport / GetRecvStateReport / GetSendRpcReport / GetRecvRpcReport. Returns EMAReport { TotalAvg, TotalAvgPerSecond, CurrentAvgPerSecond, Min, Max }. New header: EMA.h
Removed: public ObjectChild::TargetObjectHash (uint32_t) field
Changed: Client::CreateSubObject parameter targetObjectHash (uint32_t) renamed to engineHash (uint64_t, widened); ObjectSpecialFlags parameter replaced by uint32_t engineFlags
Changed: ObjectChild::Parent is now private. Access via static ObjectChild::GetParent(obj)
Changed: most ObjectRoot state is private with getters (GetMap, GetOwner, GetOwnerMode, GetTime, IsReady, GetHasReceivedState, GetPluginVersion, GetClientVersion, GetSubObjects)
Changed: ObjectRoot::RequiredObjects() returns std::span<ObjectId> (was ObjectId*)
Changed: Object::StringHeap is lazy-allocated ({0}); was pre-allocated to 1024 bytes
Changed: Object::SetHasValidData() no longer takes a bool argument (always sets the flag)
Changed: LogLevel enum is now a bitmask (Trace = 1 << 0 ... Error = 1 << 4)
Added: WriteBuffer::WriteMap(Map) / ReadBuffer::ReadMap() wire codec for the new Map typedef
Added: public PhotonCommon types: Broadcaster<Sig>, Subscription, ScopedSubscription, SubscriptionBag, Result<T, CodeT>, Task<T> (C++20 coroutine), Error<CodeT>, LogOutput, LogUtils, SpanCompat, StringType, StringViewType, CoroutineCompat, PhotonAssert
Changed: every long-running RealtimeClient operation now returns Task<Result<T>> (Connect / Reconnect / Disconnect / CreateRoom / JoinRoom / JoinOrCreateRoom / JoinRandomRoom / JoinRandomOrCreateRoom / LeaveRoom / JoinLobby / LeaveLobby / GetLobbyStats / FindFriends / WebRpc / AvailableRegions / SelectRegion)
Added: RealtimeClient broadcasters OnRoomJoined, OnRoomLeft, OnDirectConnectionEstablished, OnDirectConnectionFailed, OnCustomOperationResponse, OnCacheSliceChanged, OnPropertiesChangeFailed, OnAppStatsUpdated, OnWarning
Added: RealtimeClient::SendCustomOperation, SendCustomAuthData, SetAutoJoinLobby, GetCountPlayersIngame, GetCountGamesRunning, GetCountPlayersOnline
Added: public PhotonMatchmaking option/value types ClientConstructOptions, ConnectOptions, CreateRoomOptions, JoinRoomOptions, MatchmakingOptions, EventOptions, DirectMessageOptions, MutableRoomView, PlayerView, RoomListing, LobbyStats, FriendInfo, NetworkStats, TrafficStats, TrafficStatsGameLevel, WebFlags, WebRpcResponse, PropertyValue, AuthenticationValues, RegionInfo, ConnectionState, DisconnectCause, LobbyType, MatchmakingMode, RegionSelectionMode, ServerType, DirectMode, ReceiverGroup, CustomAuthenticationType, EventCache, EventCallback, ConnectionProtocol, SerializationProtocol, ErrorCode
Added: FusionRoomProperties.h exposing canonical room property keys (Config / MapData / SdkVersion), FusionConfigDefaults::Json, FusionMapStateBuilder::Build / Empty / BuildBase64 / EmptyBase64, FusionSdkVersionBuilder::ToBytes / ToBase64, Base64::Encode / Decode
Added: CAPI helpers fusion_room_property_key_config / _map_data / _sdk_version, fusion_config_defaults_json, fusion_map_state_empty_base64, fusion_sdk_version_current_base64, fusion_base64_encode / _decode
Added: CAPI web-flag bitmask FUSION_WEB_FLAG_HTTP_FORWARD, FUSION_WEB_FLAG_SEND_AUTH_COOKIE, FUSION_WEB_FLAG_SEND_SYNC, FUSION_WEB_FLAG_SEND_STATE
Added: Tools/FusionCore/Fusion{Config,Build,Install,ConfigBuildInstallAll,PackagePlugin}.ps1 PowerShell wrappers around the preset matrix
Added: Tools/Common/{Logging,TeamCity}/*.psm1 shared PowerShell modules
Added: Tools/Changelog/generate_changelog.py Python changelog generator (with mapping.json categorization)
Changed: GoogleTest 1.17.0 fetched via FetchContent when PHOTON_BUILD_TESTS=ON. gtest_force_shared_crt is matched to FUSION_MSVC_RUNTIME_LIBRARY
Migration Notes
1. Global rename SharedMode:: → FusionCore:: (the included SharedModeCompat.h covers some callers; plan for a real rename)
1. PlayerId is uint16_t and ObjectId's middle 16 bits are now Map — re-derive any custom packing or wire serialization. Sentinels moved from the 0xFFFFFFFF family to the 0xFFFF family
1. ObjectTail is 72 bytes (ExtraTailWords = 18); recompute any direct word offsets and rename SendRate → RoomSendRate
1. Replace ChangeScene(idx, seq, data) with MapChange(data) (or MapAdd); subscribe to OnMapChange(maps, initial) and diff the table; swap DestroyModes::SceneChange → MapChange
1. Replace CreateSceneObject with CreateMapObject. Pass Map instead of uint32_t scene and uint32_t engineFlags instead of ObjectSpecialFlags. For sub-objects, targetObjectHash becomes engineHash (uint64_t)
1. Drop DescriptorTypeHash from CreateUserRpc; SendUserRpc takes Rpc& (non-const). Replace RpcFlags{._value=...} with the strong enum and HasFlag()
1. Rename SetSendRate → SetRoomSendRate and ResetSendRate → ResetRoomSendRate. Pair SetLocalSendRate with the new ResetLocalSendRate
1. Client-level interest-key methods are gone; use Client::GetLocalInterestKeys() / GetPlayerInterestKeys(player) and call methods on the returned InterestKeySet
1. Drop reads of Object::Status / SpecialFlags / Header and the per-frame byte counters. Use ObjectRoot::IsReady() / GetHasReceivedState(), EngineBlob / EngineFlags / EngineHash, and the EMA reports
1. Subscribe to OnObjectOwnerAssigned (replaces OnOwnerWasGiven) and OnPredictionOverride (replaces OnObjectPredictionOverride); add OnPredictionReset if you use PlayerPredicted
1. Initiate ownership transfers via Client::SetGiveAwayOwner(obj, player); grant inbound requests by returning true from OnOwnershipRequest; deny via Client::RejectOwnershipRequest(obj)
1. For C ABI integrations, switch to FusionCAPI.h (the old SDK had no C ABI). For CMake on MSVC, set FUSION_MSVC_RUNTIME_LIBRARY to MultiThreaded or MultiThreadedDLL and pick the matching preset

3.0.0

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