I'm really stoopid... I wanted to do a 2048x512 or 1024x256 texture with back/front overlaped UV's and I forgot to stretch the Uv's to take the 0-1 uv space entierely... Now I have to sculpt this again with the new UV's because I can't import them in the current highpoly... :wallbash: PS : I tried to do a quick normal map, 1024x256, and a basic texture, then I exported from max in OBJ, imported in blender to have the collision ( the niftools doesn't works on my 3ds max 2010, the niftools 2010 beta doesn't appear, or I can't find it ). I tested ingame, it works perfectly, the non-square texture is automatically stretched on a square and match the UV's. :biggrin: A 2048x512 texture+normal map will be good I think.