diff --git a/Assets/Scripts/MatchManager.cs b/Assets/Scripts/MatchManager.cs
index a2d715f..4865028 100644
--- a/Assets/Scripts/MatchManager.cs
+++ b/Assets/Scripts/MatchManager.cs
@@ -97,6 +97,13 @@ public class MatchManager : MonoBehaviour
// client every time. An independent System.Random decouples the pick from that shared global state.
private readonly System.Random _roleRng = new System.Random(System.Guid.NewGuid().GetHashCode());
+ // Painting carry across an avatar respawn (scene switch). Per-machine: the LOCAL owner's painting,
+ // parked here by its despawning PlayerPaintSync (that component is gone before the replacement spawns)
+ // and consumed once by the next owner avatar. This manager is persistent in Main, so it bridges the
+ // despawn->spawn gap. Cleared on teardown (ReturnToMainOnly) so a fresh session never inherits a
+ // previous one's painting; a normal respawn keeps Main loaded, so the parked copy survives it.
+ private byte[] _carriedPaint;
+
private void Awake()
{
if (Instance && Instance != this) { Destroy(this); return; }
@@ -381,6 +388,10 @@ public class MatchManager : MonoBehaviour
// active gameplay scene is unloaded, otherwise Unity has no valid active scene to fall back to.
private void ReturnToMainOnly()
{
+ // A real disconnect/shutdown is not a respawn: drop any parked painting so a fresh session
+ // (re-host / reconnect) never restores a previous match's painting onto its first avatar.
+ _carriedPaint = null;
+
Scene main = SceneManager.GetSceneByName(mainSceneName);
if (main.IsValid() && main.isLoaded) SceneManager.SetActiveScene(main);
@@ -400,4 +411,15 @@ public class MatchManager : MonoBehaviour
if (s.IsValid() && s.isLoaded && s != SceneManager.GetActiveScene())
SceneManager.UnloadSceneAsync(s);
}
+
+ /// Owner-side: park the local painting so the avatar a scene switch spawns next can restore it.
+ public void StoreCarriedPaint(byte[] data) => _carriedPaint = data;
+
+ /// Owner-side: take (and clear) the parked painting for the freshly spawned avatar, or null if none.
+ public byte[] TakeCarriedPaint()
+ {
+ byte[] d = _carriedPaint;
+ _carriedPaint = null;
+ return d;
+ }
}
diff --git a/Assets/Scripts/MeshPainter.Net.cs b/Assets/Scripts/MeshPainter.Net.cs
index 0a6759e..d716aee 100644
--- a/Assets/Scripts/MeshPainter.Net.cs
+++ b/Assets/Scripts/MeshPainter.Net.cs
@@ -238,6 +238,31 @@ public partial class MeshPainter
SetHistoryBaseline(canonical, baselineId);
}
+ ///
+ /// Owner-side: re-seeds the painter from an in-memory snapshot blob and resets history to it as a fresh
+ /// local baseline - exactly like does for a file, just from bytes. Used to
+ /// carry a painting onto a freshly spawned avatar across a scene-switch respawn; the caller then
+ /// BroadcastLoadedPaint()s it to peers via the same path a manual load uses. Returns false if the painter
+ /// is not ready or the blob is missing / incompatible (the current painting is left untouched).
+ ///
+ public bool LoadPaintFromSnapshot(byte[] compressed)
+ {
+ if (!_setupValid || compressed == null || compressed.Length == 0) return false;
+
+ Color32[][] canonical;
+ try { canonical = DecodeSnapshot(compressed); }
+ catch (System.Exception e)
+ {
+ Debug.LogWarning($"[MeshPainter] Carry snapshot decode failed: {e.Message}", this);
+ return false;
+ }
+ if (canonical == null) return false;
+
+ ReseedCanonical(canonical);
+ ResetHistoryToCurrent(canonical);
+ return true;
+ }
+
private Color32[][] DecodeSnapshot(byte[] compressed)
{
byte[] raw = Inflate(compressed);
diff --git a/Assets/Scripts/PlayerPaintSync.cs b/Assets/Scripts/PlayerPaintSync.cs
index 1dea744..17c6f97 100644
--- a/Assets/Scripts/PlayerPaintSync.cs
+++ b/Assets/Scripts/PlayerPaintSync.cs
@@ -27,6 +27,15 @@ using UnityEngine;
/// sequence - so no stroke is lost or double-applied across the join window. The applied snapshot also
/// becomes the joiner's history baseline.
///
+/// Respawn carry: a scene switch (lobby <-> map) despawns the avatar and spawns a new prefab, which
+/// would otherwise start blank. On despawn the owner parks a snapshot of its painting on the persistent
+/// MatchManager; the replacement avatar's owner takes it on spawn and, once its painter is ready, loads it
+/// and BroadcastLoadedPaint()s it - the exact path a manual load uses - so the painting follows the player
+/// across the respawn for every peer. A real disconnect clears the parked copy, so sessions don't bleed.
+/// On respawn this carry-broadcast and the replica's own late-join request both deliver a full snapshot at
+/// once, so transfers are id-tagged (only the active one reassembles/applies) and cutoff-ordered (an older
+/// snapshot never overwrites a newer one) - otherwise the two would share a buffer and decode corrupted.
+///
/// Emission intensity is the one paint property that is NOT baked into the maps (it's a global
/// multiplier on the material's _EmissionColor), so it can't ride the stamp/snapshot path. It rides its
/// own owner-authoritative NetworkVariable; the remote painter's per-frame RefreshEmissionColor picks up
@@ -98,6 +107,22 @@ public class PlayerPaintSync : NetworkBehaviour
private bool _snapReadyToApply; // last chunk arrived; apply once the painter is ready
private readonly List _buffered = new List();
+ // A scene-switch respawn delivers TWO full snapshots to the same replica at once: this replica's own
+ // late-join RequestSnapshotRpc AND the owner's carry BroadcastLoadedPaint. Without isolation they share
+ // one reassembly buffer and one End() trigger, so a half-filled/mixed Deflate blob gets decoded -> the
+ // "Corrupted data" warning, paint never applies. Each outgoing transfer carries a unique id; only the
+ // active one fills the buffer and applies, and a stale chunk/End from a superseded transfer is ignored.
+ private int _activeXferId;
+ // Highest snapshot cutoff accepted so far. A transfer carrying OLDER state is dropped, so a late blank
+ // late-join (server replica still empty at capture) can't overwrite the newer carry. Equal is accepted
+ // so the owner-snapshot heal path (same cutoff, but the diverged peer genuinely needs it) still works.
+ private int _acceptedCutoffFloor = int.MinValue;
+
+ // Owner-only: painting carried over from the avatar a scene switch just despawned (taken from the
+ // persistent MatchManager on spawn). Applied in LateUpdate once this fresh painter is ready, then
+ // rebroadcast to peers via the same path a manual load uses. Null = nothing to carry.
+ private byte[] _pendingCarry;
+
private void Awake() => _painter = GetComponentInChildren(true);
public override void OnNetworkSpawn()
@@ -110,6 +135,10 @@ public class PlayerPaintSync : NetworkBehaviour
_painter.OnStampCommitted += OnStampCommitted;
_painter.OnHistoryCheckpoint += OnLocalCheckpoint;
_painter.OnHistoryRestore += OnLocalRestore;
+
+ // Carry the painting from the avatar a scene switch just despawned (if any) onto this fresh one.
+ // Applied in LateUpdate once the painter has finished setup, then broadcast to peers.
+ if (MatchManager.Instance) _pendingCarry = MatchManager.Instance.TakeCarriedPaint();
}
else
{
@@ -135,6 +164,12 @@ public class PlayerPaintSync : NetworkBehaviour
{
if (_painter && IsOwner)
{
+ // Park the current painting so the avatar this scene switch spawns next can restore it. A real
+ // disconnect clears the parked copy (MatchManager.ReturnToMainOnly), so a fresh session never
+ // inherits it. Captured here, the latest possible point, so last-second strokes are included.
+ if (MatchManager.Instance && _painter.TryCaptureSnapshot(out byte[] snap))
+ MatchManager.Instance.StoreCarriedPaint(snap);
+
_painter.OnStampCommitted -= OnStampCommitted;
_painter.OnHistoryCheckpoint -= OnLocalCheckpoint;
_painter.OnHistoryRestore -= OnLocalRestore;
@@ -189,6 +224,20 @@ public class PlayerPaintSync : NetworkBehaviour
if (!IsOwner)
return;
+ // Restore a carried-over painting onto this fresh avatar once the painter is ready, then propagate
+ // it to peers exactly like a manual load (BroadcastLoadedPaint). One-shot: cleared whether or not it
+ // took, so a failed/empty carry never retries every frame.
+ if (_pendingCarry != null && _painter && _painter.IsPaintReady)
+ {
+ byte[] carry = _pendingCarry;
+ _pendingCarry = null;
+ if (_painter.LoadPaintFromSnapshot(carry))
+ {
+ LogSync($"carried painting onto respawned avatar ({carry.Length} bytes); rebroadcasting to peers");
+ BroadcastLoadedPaint();
+ }
+ }
+
// Publish the owner's global emission intensity when the HUD slider changes it (delta-only; the
// NetworkVariable dirties only on an actual change, so assigning the same value is a no-op).
if (_painter && _emissionIntensity.Value != _painter.emissionIntensity)
@@ -423,11 +472,16 @@ public class PlayerPaintSync : NetworkBehaviour
StartCoroutine(SendSnapshot(new[] { p.Receive.SenderClientId }, data, capturedSeq, baselineId));
}
+ // Server-side monotonic id stamped on each outgoing snapshot transfer, so a replica that receives two
+ // overlapping transfers (respawn: its late-join + the owner's carry) can tell them apart and isolate them.
+ private int _xferOut;
+
private IEnumerator SendSnapshot(ulong[] targets, byte[] data, int capturedSeq, int baselineId)
{
var send = new ClientRpcParams { Send = new ClientRpcSendParams { TargetClientIds = targets } };
+ int xferId = ++_xferOut;
- BeginSnapshotClientRpc(data.Length, capturedSeq, baselineId, send);
+ BeginSnapshotClientRpc(xferId, data.Length, capturedSeq, baselineId, send);
int sentThisFrame = 0;
for (int off = 0; off < data.Length; off += snapshotChunkBytes)
@@ -435,7 +489,7 @@ public class PlayerPaintSync : NetworkBehaviour
int len = Mathf.Min(snapshotChunkBytes, data.Length - off);
var chunk = new byte[len];
System.Array.Copy(data, off, chunk, 0, len);
- SnapshotChunkClientRpc(off, chunk, send);
+ SnapshotChunkClientRpc(xferId, off, chunk, send);
if (++sentThisFrame >= snapshotChunksPerFrame)
{
@@ -444,31 +498,42 @@ public class PlayerPaintSync : NetworkBehaviour
}
}
- EndSnapshotClientRpc(send);
+ EndSnapshotClientRpc(xferId, send);
}
[ClientRpc]
- private void BeginSnapshotClientRpc(int totalBytes, int capturedSeq, int baselineId, ClientRpcParams p = default)
+ private void BeginSnapshotClientRpc(int xferId, int totalBytes, int capturedSeq, int baselineId, ClientRpcParams p = default)
{
+ // Drop a transfer that carries older state than one already accepted/applied (a late blank late-join
+ // racing the carry). Equal cutoff is allowed so the owner-snapshot heal still lands.
+ if (capturedSeq < _acceptedCutoffFloor)
+ {
+ LogSync($"ignoring stale snapshot #{xferId} (cutoff {capturedSeq} < accepted {_acceptedCutoffFloor})");
+ return;
+ }
+
+ _acceptedCutoffFloor = capturedSeq;
+ _activeXferId = xferId;
_snapBuffer = new byte[totalBytes];
_snapCapturedSeq = capturedSeq;
_snapBaselineId = baselineId;
_snapReadyToApply = false;
_awaitingSnapshot = true;
- LogSync($"receiving snapshot ({totalBytes} bytes, cutoff {capturedSeq}, baseline {baselineId})");
+ LogSync($"receiving snapshot #{xferId} ({totalBytes} bytes, cutoff {capturedSeq}, baseline {baselineId})");
}
[ClientRpc]
- private void SnapshotChunkClientRpc(int offset, byte[] chunk, ClientRpcParams p = default)
+ private void SnapshotChunkClientRpc(int xferId, int offset, byte[] chunk, ClientRpcParams p = default)
{
- if (_snapBuffer == null) return;
+ if (xferId != _activeXferId || _snapBuffer == null) return; // stale chunk from a superseded transfer
if (offset >= 0 && offset + chunk.Length <= _snapBuffer.Length)
System.Array.Copy(chunk, 0, _snapBuffer, offset, chunk.Length);
}
[ClientRpc]
- private void EndSnapshotClientRpc(ClientRpcParams p = default)
+ private void EndSnapshotClientRpc(int xferId, ClientRpcParams p = default)
{
+ if (xferId != _activeXferId) return; // stale End from a superseded transfer; the active one still owns the buffer
// Apply happens in LateUpdate (once the painter is ready) so apply + buffered replay stay ordered.
_snapReadyToApply = _snapBuffer != null;
if (!_snapReadyToApply)