Trackmodding questions (solved)

[JJS209]

i used gimp for removing the alpha channel on grass and road tarmac.
(open image - layer - transparency - remove alpha channel. file - export as... - replace the opened *.tga)

http://www.gp-bikes.de/team-germany/tracks/Reflect/images/screen001.jpg

Thank you so much janaucarre and Hawk UK!