Slashdot Mirror

nice mirror here thanks to www.shacknews.com. You will need to register for an account to download though.

Another benefit besides accuracy for multi-pass rendering with tens or hundreds of passes, is that it allows for high dynamic range rendering. 128 bits is enough to encode candlelight and daylight in the same floating point number. So the game engine can just "count up photons" as Carmack says in his recent speech, and then the 128-bit passes are done, then the final pass samples it down to 32-bit for presentation on the monitor. This allows the downsampling to take advantage of any information available on the the monitor's gamma curve - what the actual displayed intensity is for a given value. It also lets programmers give up one level of fudging and simply do physically correct lighting calculations, since they can leave the presentation issues to the final downsample.

Team Sportscast Network broadcast the speech live, which is what the MP3 came from.

For the speech... http://www.fileshack.com/file.x?fid=855