URP Cookbook: Compute shaders - Part 1: Particle fun

3-Second Blueprint (English)

1. Allocates a GPU-resident ComputeBuffer by element count and stride, transferring particle structs from RAM to VRAM via SetData.
2. Dispatches HLSL compute kernels in (256, 1, 1) thread groups to update thousands of particle positions and lifetimes in parallel.
3. Binds a read-only StructuredBuffer indexed by instanceID in a URP point shader to position particles and fade RGBA alpha over life.