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

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

Canali, you should read the first post completely and it says

get the code from the box below and the needed userlibs from:
www.geocities.com/spirala7/dx7sshad.htm


make sure you do that, and put the files into the userlibs folder