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Not Reproducible
Votes
1
Found in
2020.2.0a17
Issue ID
1263399
Regression
No
[GPU Instancing] Switching shaders with wrong vertex streams can lead GPU instanced systems to glitch or crash
Repro steps:
1. Create a particle system and set a large capacity/emission count (at least 1,000 particles)
2. In the Renderer, set the particles to mesh and ensure GPU instancing is enabled
3. Assign a Particle-specific material
4. Fix all vertex stream issues in the material inspector
5. Change the system's material to a non-particle one (i.e. a default Lit material)
6. Duplicate the system and move it around
7. Observe the glitch.
Expected outcome:
- mismatching vertex streams to not cause glitches or crashes.
Notes:
- quite hard to reproduce, especially the crash
- the tests was done in URP, but it's most likely not SRP-specific
Crash stack trace:
========== OUTPUTTING STACK TRACE ==================
0x00007FF78B6D5CC7 (Unity) [C:\buildslave\unity\build\Modules\ParticleSystem\ParticleSystemGeometryJob.cpp:135] TransformParticleMesh<1,0,0,0>
0x00007FF78B6DD9B8 (Unity) [C:\buildslave\unity\build\Modules\ParticleSystem\ParticleSystemGeometryJob.cpp:287] TransformParticleMeshAnimatedUVs<0>
0x00007FF78B6AA71C (Unity) [C:\buildslave\unity\build\Modules\ParticleSystem\ParticleSystemGeometryJob.cpp:1931] DrawMeshParticles<1,0>
0x00007FF78B6E3F7B (Unity) [C:\buildslave\unity\build\Modules\ParticleSystem\ParticleSystemGeometryJob.cpp:2823] ParticleSystemGeometryJob::RenderJobCommon
0x00007FF78B6E39D0 (Unity) [C:\buildslave\unity\build\Modules\ParticleSystem\ParticleSystemGeometryJob.cpp:2679] ParticleSystemGeometryJob::RenderJob
0x00007FF788CDE197 (Unity) [C:\buildslave\unity\build\Runtime\Jobs\Internal\JobQueue.cpp:617] JobQueue::Exec
0x00007FF788CE5DB2 (Unity) [C:\buildslave\unity\build\Runtime\Jobs\Internal\JobQueue.cpp:727] JobQueue::Steal
0x00007FF788CDEB60 (Unity) [C:\buildslave\unity\build\Runtime\Jobs\Internal\JobQueue.cpp:850] JobQueue::ExecuteJobFromQueue
0x00007FF788CE07AB (Unity) [C:\buildslave\unity\build\Runtime\Jobs\Internal\JobQueue.cpp:944] JobQueue::ProcessJobs
0x00007FF788CE71BF (Unity) [C:\buildslave\unity\build\Runtime\Jobs\Internal\JobQueue.cpp:1028] JobQueue::WorkLoop
0x00007FF789311F95 (Unity) [C:\buildslave\unity\build\Runtime\Threads\Thread.cpp:78] Thread::RunThreadWrapper
0x00007FFA86747BD4 (KERNEL32) BaseThreadInitThunk
0x00007FFA881ACE51 (ntdll) RtlUserThreadStart
========== END OF STACKTRACE ===========
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GenericJoe
Aug 06, 2020 13:30
I am getting exactly the same crash error, in Unity version 2019.4.6f1
It is hard to recreate on my end and appears random.
========== OUTPUTTING STACK TRACE ==================
0x00007FFEBCA435A1 (UnityPlayer) TransformParticleMesh<1,1,1,0>
0x00007FFEBCA5165D (UnityPlayer) TransformParticleMeshAnimatedUVs<0>
0x00007FFEBCA1E7B7 (UnityPlayer) DrawMeshParticles<1,2>
0x00007FFEBCA57949 (UnityPlayer) ParticleSystemGeometryJob::RenderJobCommon
0x00007FFEBCA5751B (UnityPlayer) ParticleSystemGeometryJob::RenderJob
0x00007FFEBC42D5C8 (UnityPlayer) JobQueue::Exec
0x00007FFEBC42D9FA (UnityPlayer) JobQueue::ProcessJobs
0x00007FFEBC42EB50 (UnityPlayer) JobQueue::WorkLoop
0x00007FFEBC51A2C8 (UnityPlayer) Thread::RunThreadWrapper
0x00007FFF0C557BD4 (KERNEL32) BaseThreadInitThunk
0x00007FFF0CD8CE51 (ntdll) RtlUserThreadStart
========== END OF STACKTRACE ===========