ObjTest Simple Wavefront Obj Test Suite Uses TinyObj to test Obj validity. https://github.com/tinyobjloader/tinyobjloader Currently only supports MTL checking with PBR https://en.wikipedia.org/wiki/Wavefront_.obj_file#Material_template_library http://exocortex.com/blog/extending_wavefront_mtl_to_support_pbr Todo: Geometry 3D Viewer