Specify the lighting mode for drawing 3D models.
void gameSetModelLighting( int on )
= 1 (smooth model lighting) or 0 (flat lighting)
= void (nothing)
This function sets the lighting mode for drawing 3D models.
This default mode is "flat lighting" (on = 0). This results in a single shaded value for each triangle.
The other mode, "smooth model lighting" (on = 1) uses the normals as specified within the 3D model itself and results in 3 shaded values for each triangle (one per vertex / point on every triangle).