Particle Systems flicker when partly behind transparent objects

Question

Created Jul ’24

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I am having a difficult time to create particle systems in Reality Composer Pro (visionOS beta 3). They tend to start to flicker and all particles disappear and reappear in semi-random intervals.

I can clearly see that happening with one effect that I put inside a small box consisting of 4 transparent walls that has a solid floor. When I change the view angle the particle system starts to flicker when viewed from below its emission height.

I tried all combinations of particle rendering: billboard->free, additive etc and it does not change anything. I am using the default particle image.

Any help appreciated

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Answer 1

Vision Pro Engineer OP

Apple

Aug ’24

I think it would be worth posting a FB with a project on this so the engineers at Apple can investigate.

Otherwise, try applying ModelSortGroupComponent to your particles and the box's walls.

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Answer 2

patchedreality OP

Sep ’24

I am seeing the same thing. I created a ShaderGraphMaterial that has transparency, and applied it to a sphere. Then added a spherical particle system around it. The particles in front of the sphere flicker on and off.

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