Im in need of a kind of special case withe the HDRP.
I have a project that requires rendering a image of an object / scene with alpha channel in a RenderTexture.
The original project was in unity 2018.2.16 with HDRP 3.0.0-preview and Post Processing 2.0.13-Preview.
The RenderTexture did look like this:
Color:
Oh, i thought you were controlling the rendering process.
In this case i think this would require to fiddle with the rendering pipeline code itself, but i haven’t done it so i can’t suggest anything.
This looks like a serious problem for devs if there aren’t any available options to obtain the alpha channel for now, i hope Unity will add such an option in the future.