Since we don't have a dedicated forum on rtb yet.i post the problems here.please feel free to added your problems here ( not I can't afford it one either). the bugs in RTB only my section: 1) ok, I watch the video on vertex painting and was impressed but.....I try this and save the fbx file in rtb. upon reloading all the vertex painting has gone. And the background image has come back.minus any vertex painting I done. 2) the main default textures are reloading, even if you changed the Texture. From sand to a road upon reloading your Fbx file the texture is revert back to [default textures] sand.