I decided to add to my game few trees, I already quake 3 model loader (md3) its for characters and method for texture drawing is store in *.ini file. I found a package of trees in MD3 and I have no problem with loading model alone, but there is a *.shader file and i have no idea how to load it to draw texture properly.
Tree pack: http://www.custommapmakers.org/wiki/index.php/Models:GR_Trees_set
I do not have to use exactly this format, I can write another loader, but trees in *.obj or .3ds look even harder