Tangent Space and Normal Maps Currently, Sketchfab only supports tangent space normal mapping. If you export a valid format with tangent spaces, we keep them. Otherwise, if you include UVs, we generate the tangent spaces. See also Materials (PBR). James November 15, 2017 20:27 Updated Follow Related articles Materials (PBR) Vertex Normals Materials and Textures How to Upload Model Files WordPress Comments 0 comments Please sign in to leave a comment.