Lightmass: Transparent Material

[jocose]

I made a transparent material but I cant get light to pass through it from one side to the other.

Does anyone know if there is any trick to making lightmass work with a transparent material?

[Ben Apuna]

Is that (http://udn.epicgames.com/Three/Lightmass.html#Translucent%20shadows) what you're looking for, or this (http://udn.epicgames.com/Three/Lightmass.html#Masked%20shadows)?

so I guess:

Lit materials

BLEND_Translucent and BLEND_Additive: Transmission = Lerp(White, Diffuse, Opacity)
BLEND_Modulate: Transmission = Diffuse
BLEND_Masked

Unlit materials
BLEND_Translucent and BLEND_Additive: Transmission = Lerp(White, Emissive, Opacity)
BLEND_Modulate: Transmission = Emissive
BLEND_Masked

[jocose]

Perfect Ben I had a go re-creating "this (http://udn.epicgames.com/Three/Lightmass.html#Masked%20shadows)" :P and got it working with your setup. Not sure what I was doing wrong the first time around if I figure it out I will post back here.

As always you've been a huge help thanks a bunch!