Set a texture parameter.
This function can either set a regular texture that is read in the
compute shader, or an output texture that is written into by the shader.
For an output texture, it has to be a RenderTexture with random write
flag enabled, see RenderTexture.enableRandomWrite.
Buffers and textures are set per-kernel. Use FindKernel to find kernel index by function name.
See Also: FindKernel, SetBuffer, RenderTexture.enableRandomWrite.