I have a PRT loader and a light. When the light has a multiplier of 200,000, the particles the light hits disappear. Both from the alpha channel and from the PCache. Seems like if the lighting hits a certain value, the points are removed. I’ll file a better report soon, and it’s low priority, I just found it odd.
I expect this would have to do with using a 16 bit float for lighting and colour. I suspect upping those channels to 32 bit precision might remove or reduce that problem.
-Mark
Actually, this new “ray culling” tool is actually a lot of fun.
By rendering in float we can scale the exposure in post, so the workaround is pretty easy.