Carmack's Reverse

[DT.]

I've noticed from the comments that the code is using Carmack's Reverse, which afaik is patented and cannot be used. This makes its use in OpenJK illegal, right?

[Raz0r]

Carmack ended up rewriting "Carmack's Reverse" to avoid those patent issues, so D3 source was released much earlier.

Lawyer's don't care too much about it (i.e. they won't chase a non-profit when the technique is widely known) and we can just add a better shadowing method (i.e. actual shadow mapping, not shadow volumes)

[DT.]

Shadow mapping would be great.