Hello,
the new Belleza v3 body has 3 clothing layers, each ones has a Mode button that you can toggle between MASK and BLEND. MASK usually breaks layers that have transparent bits and BLEND displays the alpha as it should look like.
1. BLEND mode:
2. MASK mode:
At least in Firestorm this works. In Cool VL Viewer, whichever mode I chose, it looks broken like in MASK mode.
Background infos for that part:
* client is NOT in deferred mode
* automatic alpha masks are ON (<-- yah, I know what you wanna say now!)
If I now set
* automatic alpha masks OFF
and relog (which is like always required for that toggle), it looks fine. So for Cool VL Viewer I need to toggle a global setting (which works for ALL layers then) and need to relog, in Firestorm a button on a HUD does it. I wonder what they made different in Firestorm, which makes the blending/masking work.
I know we had this topic already, and you said the masking stuff is kind broken in the LL base code. But maybe this helps you to find something in Firestorm to improve the Cool VL Viewer code?
Probably their code has different bugs you don't like, but maybe it's worth a look. 
