I have a question? Can I use blender3d to develop a game for
md2, md3, md5, *.x , cal3d, obj export.
yep, much rather possible.
Still, wouldbe needed an extra software to generate lightmaps.
Sadly, not much freely available.
Soon will be Deled editor be having free lightmaps. But only small 16x16 pixels ones…quite poor.
Slimshady is another free tool , but no support for curved surfaces.
Gile[s] , 40$ , is by far the best option.
For comercial games, imho is needed a second uv channel, and lightmaps generated and baked into a texture.