I have been improving my engine to use larger models but I have seen some with strange data inside.
It was my understanding that the face elements at the end of the file should consist of three sets of data containing, Indices , texture coords and normals. But i found a teapot example with face data in this format.
f 7771/8201 7770/8200 7758/8187 7759/8188
I know it’s the indices and texture data but why is there 4 sets of data??