From ENIGMA
This article is an overview of render state/mode related constants.
Render modes
Constant
 Description

rs_fill
 Fill the entire shape.

rs_line
 Only draw the edges of each face.

rs_point
 Only draw each vertex as a single point.

Face modes
Constant
 Description

rs_front
 front faces, defined by orientation

rs_back
 back faces, defined by orientation

rs_front_back
 front and back faces

Orientations
Constant
 Description

rs_clockwise
 clockwise face culling

rs_counterclockwise
 counterclockwise face culling

Quality Hints
Constant
 Description

rs_nicest
 nicest looking

rs_fastest
 fastest to render

rs_dontcare
 does not matter which

Fog Mode
Constant
 Description

rs_exp
 exponential fog

rs_exp2
 exponential fog 2

rs_linear
 linear fog

Operators
Constant
 Description

rs_never
 Always False

rs_less
 source Z < depth Z

rs_equal
 source Z = depth Z

rs_lequal
 source Z <= depth Z

rs_greater
 source Z > depth Z

rs_notequal
 source Z != depth Z

rs_gequal
 source Z >= depth Z

rs_always
 Always True
