MPC: Are you using DirectX 9 equivalent? For Doom 4 as well?
JC: Yes to both. It’s one of those things I get asked a lot. What’s big and exciting for DirectX 10 or DirectX 11? There’s not a whole lot of… really not a whole lot. The big touted geometry shaders were in many ways, a mistaken belief that people desperately wanted to create stencil shadow volume.
There’s a tough thing with that. You get a bunch of people who make APIs, and they think “it’s my job to make APIs. I make new APIs every year.” There’s a reality of approaching a functionality curve, and the DX9 level gives us a whole lot of stuff where it’s not like before, even at the DX7 functionality level. Graphics programmers have tried every possible configuration, and they’ve tried every state and know what happens when. But, as soon as you get programmability in there (as happened with DX9) you’re writing code now. The code is limited, but we’re so far from exhausting the possibilities.