Create a compute shader

Similar to shader assets, compute shaderA program that runs on the GPU. More info
See in Glossary assets are files in your project. with a .compute file extension. They are written in DirectX 11 style HLSL language, with a minimal number of #pragma compilation directives to indicate which functions to compile as compute shader kernels.

Check if a platform supports compute shaders

Compute shader support can be queried at runtime using SystemInfo.supportsComputeShaders.

Create a compute shader asset

Here’s a basic example of a compute shader file, which fills the output texture with red:

// test.compute

#pragma kernel FillWithRed

RWTexture2D<float4> res;

[numthreads(1,1,1)]
void FillWithRed (uint3 dtid : SV_DispatchThreadID)
{
    res[dtid.xy] = float4(1,0,0,1);
}

The language is standard DX11 HLSL, with an additional #pragma kernel FillWithRed directive. One compute shader Asset file must contain at least onecompute kernel that can be invoked, and that function is indicated by the #pragma directive. There can be more kernels in the file; just add multiple #pragma kernel lines.

When using multiple #pragma kernel lines, note that comments of the style // text are not permitted on the same line as the #pragma kernel directives, and cause compilation errors if used.

The #pragma kernel line can optionally be followed by a number of preprocessor macros to define while compiling that kernel, for example:

#pragma kernel KernelOne SOME_DEFINE DEFINE_WITH_VALUE=1337
#pragma kernel KernelTwo OTHER_DEFINE
// ...