Carmack's Reverse - (stencil shadows) here it is.

Blitz3D Forums/Blitz3D Programming/Carmack's Reverse - (stencil shadows) here it is.

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@RiverRatt
Prosavage onboard video or (savage4 cards) , have a stencil buffer.
You may need to turn it on in the cards control panel.
and on some cards it wont work with a 32bit Zbuffer

Zmatrix