Todo:

DONE get rid of Clone()
DONE fix cone inversion bug
DONE rendering changes property selection

Bugs:

DONE polygons should be double-sided if wanted, to stop light
DONE make RayTraceSettings static, and accessible all over–update objects to use epsilons
DONE cone doesn’t work appropriately for non-zero top radius
DONE something wrong with cone/cyl.
DONE backside normals of discs/polygons wrong?
DONE polygon meshes need to be completely refactored.

Features:

DONE add matrix
DONE add transformation base
DONE add transformation stack functionality
DONE cone

* let camera look at a specific point
* translucent materials

Enhancements:

DONE custom type converters to edit vertices, colors as strings