Alpha channels?

MSTS or Rail Sim (or other)

MSTS and RS use the TxAlpha and AlphaPr material field (right click on an object and look at material list in the properties)
Some of the information in the following tutorial also applies to RS.
[img:1z8gin9l]http://www.3DC.com/3DCDocumentation/tutorialmstsmaterials.htm[/img:1z8gin9l]
<!– m –><a class="postlink" href="http://www.amabilis.com/3DCan…ialmstsmaterials.htm">http://www.amabilis.com/3DCan…ialmstsmaterials.htm</a>&lt;!– m –>

Trainz uses the material translucency value to indicate the texture is translucent.

I have tried to add alpha channels to my models with transparency for doors, windows, cutouts, etc. No luck…. any help appreciated.
I am using 3DC Plus