John Carmack now has a Twitter account. It’s pretty interesting, in that he’s writing a ray tracer in OpenCL and relearning or rederiving various bits of knowledge that are not really written down anywhere. The guy’s unnervingly productive: “Goal for today: implement photon maps and contrast with my current megatexture radiosity gathering.”

Speaking of Twitter, Morgan McGuire’s page is the other twitter feed I would recommend, as he simply offers up worthwhile links on computer graphics and on game design. His Twitter feed mentioned a number of new resources: a new demo (with complete source) of ambient occlusion volumes at NVIDIA, and a demo of sample distribution shadow maps (optimized z partitions for cascading maps) at Intel. He also points out some entertaining visual bits.