Interesting, thanks! Yeah, I'm getting very odd results this time around with IDL... it reaches a point in the precalculation and then just gives me a wall of red, as though the IDL is going nuts. I have a mirror in the scene, which I guess may be causing this; this is the first time I've tried rendering with idl, sss and a raytraced mirror. I think I'm doing it wrong. :p

I'm running Win 10 Pro 32GB RAM Intel Core i7-4790K CPU @ 4.00GHz Nvidia GeForce GTX 1660 Ti

My DA Gallery: glen85.deviantart.com/gallery

Peace, love and polygons!