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 October 21, 2018 00:19 Updated Follow Related articles Materials (PBR) Materials and Textures Vertex Normals 3D File Formats How to Upload Model Files Comments 0 comments Please sign in to leave a comment.