I tried poster_godrays and it workes sometimes, but other times I have black picture. Actually, I can replicate black pictures by having an object in the picture to be colored black ( 0 0 0 ) or close to black using the color tool. The moment I reset the color or have it colored gray or brighter, poster_godrays start working again. I wonder why that is the case...

Now, I am aware that the development of this tool is halted indefinitely, so I am not asking for a fix. I just want to know how it behaves so I can work around some of the issues.

Thanks :D