I've been up and down the internet looking for clues and I've had no luck so here goes...
I'm trying to implement Volumetric Light Scattering and I've run into a few snags.
The basic process (unless I misunderstand) is as follows:
Conceptually I get it, that's not a problem; I'm just not getting the implementation details for step one. I have a fair amount of programming experience but shaders seem a little alien to me as I'm new to them.
Can/should I get the black geometry image before I stick it into the shader? Can/should I implement this as a multi-pass shader?
Any help, as always, would be greatly appreciated.