such as, dynamic geometry expansion / culling Hmm, let me clarify: this is the case. There are 2 types of culling implemented in the game: Frustrum (in shadow-pass) 1.1 For whole object bounding sphere, in case if props/animated objects 1.2 Per cluster, for landscape 2. HiZ (in main-pass) Frustrum culling is done as part of mesh-stage, not a task-shader. Task/Object shaders are still TODO for me. so you should try both paths on different GPUs Unfortunately I don't have any other GPU :(

I have culling in shader. Without it it's 3X slower. GPU wise M1 is only hardware that I have with Mac.

There can't be missing useResource, as they do not required: no argument buffers are in use(or similar). Tested locally useResource(tlas) - no changes

OK, thanks. useResources(every_blas) helped. Yet, need to note that this behavior is not documented on developer webside - so please update docs. Also making call to useResource* and tracking blas'ses introduces large overhead for engine. Is it possible, can you change api then? Metal knows list of blas'es anyway, from when tlas was created.

Done: https://feedbackassistant.apple.com/feedback/16297235. Thanks for pointing out to this.

I've added permalink to shader, here in first post and in feedback assistant: [quote='772346021, Try9998, /thread/772346, /profile/Try9998'] https://shader-playground.timjones.io/27565de40391f62f078c891077ba758c [/quote]

I've added MTLCompilerService crash-log, provided by user, to feedback-assistance ticket.