FART To-Do List
===============

  High Priority:
    - ambient occlusion (thanks Nick)
    - volume lights for soft shadows

  Medium Priority:
    - Shape definitions / reusability
    - Scene file pre-parser to allow includes, macros, and comments
    - Add spotlight and directional light types

  Low Priority:
    - Refraction
    - Textures in materials
    - Fix boolean objects composed of sub-objects of different transparencies