PySoy: Sphere Texturing
completed by: Samuel Kim
mentors: Amaury Medeiros, Arc Riley, Tony Young, David Czech, Mayank Singh
Add texcoord and tangent (tx, ty, ux, uy, uz) calculated values to
Texcoords should map, similar to Box, such that the cooresponding tangents also work with a cubemap (which uses position rather than texcoord values) when applied. This will require some clever "folding", there are many ways to do this which are equally correct.
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