I have a custom GPU based particle solution Im whipping up for a project and Ive got everything working really well, but now that I added alpha support for color gradients over lifetime everything breaks. I add “needAlphaBlending: true, needAlphaTesting: true,” or to the “this.mesh.hasVertexAlpha =…

CreatePlane creates a mesh with 4 vertices, but you then update the mesh so that it has 6. This means that the system now thinks there could be multiple submeshes rather than just one, which means that instead of delegating getBoundingInfo to the mesh, it will use SubMesh._boundingInfo instead. But …

Custom GPU Particle System Cant use Alpha?

Questions

Pryme8 March 7, 2026, 5:18pm 2

The crazy part is I can see in the debugger that it should not be undefined:

Particle Monkey Take 2

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Custom GPU Particle System Cant use Alpha?

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