Cool page :)

Yes, it's a lot of fun this subject... maybe in part because it's helping me figure out some of the fundamentals and some more mat room stuff.

But also, I guess I enjoyed playing with magnifying glasses as a kid ;-)

Next test render's looking better with the lower IDL Intensity (0.3). about a third done and no red rash so far...

...dunno whether I need that master diffuse value reduced or not. I had it on for the current render... but it may be that just reducing the IDL intensity was enough.

I think, from what I can see so far, that lowering the diffuse is just basically tinting the lens.