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Controlling the alpha value of a cubemap?

by Dave Calabrese · in Torque Game Engine Advanced · 11/27/2007 (10:42 am) · 3 replies

I am trying to find a way to control the alpha value of a cubemap when using Shadergen. (I know this is very easy when using custom HLSL shaders, however we are working solely with Shadergen for this project). I tried using the alpha channel of my .PNG (via the 'SuperPNG' plugin for Photoshop), however this had no effect. So, what's the trick?

Thanks,
-Dave C.
21-6 Productions
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Torque 3D Owner Eric Forhan
#1
11/27/2007 (11:16 am)
Hi Dave,

I don't know if this is related, but are you using the older version of SuperPNG found here?

Associate Dave Calabrese
Cerulean Games
#2
11/27/2007 (1:12 pm)
Yup, that was it! I was using the newer one. One I got the older one installed (and made sure I had 'save alpha' selected), it worked fine.

Now if there was just a way to make the cubemap conform to the bumpmap via Shadergen, and use a seperate map for the specular than the cubemap, since they so don't work together. ;)

Thanks a lot!
- Dave C.

Torque 3D Owner Eric Forhan
#3
11/27/2007 (1:23 pm)
Well, I must confess I'm not familiar with Shadergen.
I've not had any problems controlling the alpha value with the stock TGEA cubemap shader, though. It does take making a very dark alpha to tone it down, but works. Pure black also seems to cause troubles, so I try to avoid pure white or black just to be sure.

I'm sorry I can't be of more help, Dave.