Actually I planned to release a small script which plugs this GC-module in the actual shader. The script plugs the original diffuse input in the first node, plugs the specular input in the second node, multiplies the original diffuse value with .9 and puts it in the diffuse node, transfer the specular values to the specular node and puts zero in the original specular and diffuse value.

It does that for every material which does not have a node connected to alternate diffuse, all in a given actor.

That's pretty much what I was doing by hand in the last time. But if I'm to use a Stonemason set ever again, I need some kind of script to do that.

I planned to release this into Freestuff. I did not plan to ruin your start as a merchant BB, but since I would not pay much for such a script I did not plan to make people pay for it. 

I assume that a script done by you would have better results and most probably a nice GUI, which mine surely will not have, so maybe there is a market for that. But I assume that you would have enough to sell if you would find the time to actually prepare stuff for any marketplace. 

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

Avatar image of me done by Chidori.