Mask & Multipass Toolbox - Iray - Daz 4.1 Etc - No Masks

Hello,

I hope this questions is not redundant but I'm having some issue with the Mask and Multipass ToolBox.

I followed a couple of video tutorial as well to obtain the good old white mask on black background to use later in photoshop for some adjustment and what not.

My problem is the following: no matter what I do in the script, the system pushes out a "grey-ish" version of the original render, without texture but with all the details on teh figures, like displacements and morphs and what not.

The scene is using a Gen 3 male and gen 8 female, with tons of iray stuff all around.

Tried over and over to have a damn white mask produced, with no luck.

Someone can please help me sort this out? :)