Blending Logos

[Rafter]

Ive been trying to import logos onto locomotive bump layers (im using gimp). I can get the color onto locomotives, and I can paste the logo onto the bump layer, but when I get the logo on, I cant "blend" the logo onto the layer. any help or advice? i know ive asked a lot about reskinning but i just have a lot of questions

 

[PerRock]

Normally you don't want to put the logo on the bump map or normal maps. These maps are for telling Trainz what gets shadows and what gets highlights from the in-game sun. it's a bit of a fo-mesh details (looks the same as modeling all the details, but no where near as many polys).

peter