Snow Shader/C# RenderTexture Casting Issues

Hi All, (I also posted this here )
Thanks for your posts about this. I’ve actually created the same script using Bolt, but having the same issues as others. The rendertexture only renders the current coordinates using the shader. The previous locations don’t render – are they being overwritten or not being read? Placing the rendertexture asset into the mesh’s material splatmap and the shader did not solve it. Also, I’ve tried the same setup with custom render texture, but have same issue.
It seems like the issue is that it can’t blit from the splatmap rendertexture to the temporary render texture. But I haven’t found a workaround.

Thanks for your help.
Using Unity 2019.4.18f1
Bolt 1.4.13