Welcome to the forum. Mainly We are using AC3D to make the models. Personally i use Blender to convert and justage the models. The format of Models is ###.x and for skins ###.dds(defined in ###.x The definitonfile is ###.xli(this file binds all model- and skinfiles to RTR.exe.) But one more,the models are all passwordprotected. And i dont know,that Brainbom would give a very mighty program out his hands.