Using Normals for backface-culling...

Blitz3D Forums/Blitz3D Programming/Using Normals for backface-culling...

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BTW: use the following keys to control rotations of the sphere and the light:

Sphere:
+ - Axis
==========
A, Z x
S, X y
D, C z

Light Source:
+ - Axis
==========
F, V x
G, B y
H, N z