CopyTexture into cubemap rendertarget does not work

Unity Engine
1

Hi,

I’m trying to copy and modity the current shadowmap for point light using RenderBuffer.
I would like to use AfterShadowmap event to copy, modify and put back my custom shadow.

No problem copying the current shadowmap into a cubemap rendertexture using CopyTexture.

However when I copy my custom cubemap into the BuiltinRenderType.Active, nothing happen, like the CopyTexture fails or simply does something invalid.
Other operations, like ClearRenderTarget work fine (on each face).

I tried also to copy each individual face: Not work
Any suggestions ? Is that the wanted behavior or just a bug ?

PS:
What it is left are:

  • copy each face separately and maybe using CommandBuffer.Blit on the different cubeface (by setting the correct rendertarget options before calling it). But I suspect it is not going to work.
  • use ShadowmapPass events and blit the texture into the current active render target (but again, I think is not going to work)
2

Why not add the custom shadow pass to the material shader itself? That prevents the need to use a CommandBuffer (and the script that sets up the CommandBuffer.) Or is it a general modification to the shadowmap?