nuclear@21: Notes on how to construct tiles for the prototype
nuclear@21: -------------------------------------------------
nuclear@21: 
nuclear@21: Tile grid size 1x1x1 (geometry can be of arbitrary size if it looks ok).
nuclear@21: 
nuclear@21: - Export as OBJ with MTL, including normals and multiple objects.
nuclear@21: - Associate geometry with a particular cardinal direction by prefixing NORTH_,
nuclear@21:   SOUTH_, EAST_, or WEST_, in the object name. Directional geometry will be
nuclear@21:   ignored appropriately for cells with neighboring cells occupied.
nuclear@21: - Lights should be meshes with the LIGHT substring in their name. Bounding
nuclear@21:   sphere is used to specify the light position and attenuation. Material
nuclear@21:   parameters (diffuse) control the light intensity/color.
nuclear@21: 
nuclear@21: This is terrible, but ok for a prototype. Should write a proper exporter to a
nuclear@21: custom tile format at some point.