Gosh, there is an option in Photoshop to get rid of that white line but I cant remember what it was called. The best thing I discovered is to create an image with the background colour set to black, I have no horrid white lines around my alpha's that way.

Can we have moving 3DS objects? and an idea I have... Can we have reacting animated object? you an object to set off at a certain time/part of the coaster, you would highlight the object and track segment and press 'combine' or something and when the train passes along, the object will react. Haha, ...

In photoshop, when you create a new document, select transparent. There you have it, 90% there. Now draw a little squiggle leaving some transparent background showing. Save this as a .png or .tga. Open your 3D program and apply the texture you#ve just created to a flat object. Save it as 3DS, import...