Hi all.

I'm re-rendering my "Somewhat Fetish" pic with more ligths and a bit of volumetrics. It is taking eons to render, but this is not the problem.

The problem are the little "squary" artifacts I'm getting in one part of the picture (you can see the detail above): they are those little grey lines that weren't supposed to be there! The subject is a 2D pic inside two very thin glass cubes which make the frame. I'm rendering with normal AA and I'm at 75% of the AA pass (so this detail, up in the right corner, is already AAsed).

My suspect is that, to reduce the monstrous render times (over 10 days estimated), I tweaked the "Maximum Ray Depth" down to 4, plus I checked TIR and set to 3 max, and this caused the problem.

Ah, and I have soft shadows on most of the lights. Anyone could point me out what I'm doing wrong here? And, if I did the mistake I think I did, is it possible to plop-render the wrong part after it's finished? I don't want to restart from scracth, this pic is in the oven for 4 days already...

Thanx in advance.
Stefano