Problems with Rayshade

• Can core dump on improper inputs, e.g. specifying a window with too few parameters.
• There are several competing versions (4.0, 4.0.6, 4.0.6ext); extensions I made to 4.0 do not readily port to 4.0.6.
• Phong shading model is outdated.
• Does not run in real time (useless for online model-based tracking).

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