John Carmack, id Software co-founder and technical director, was unveiled as a surprise guest during Apple CEO Steve Jobs' keynote at this year's Worldwide Developers' Conference. While that may not be big news in and of itself to most readers, what Carmack brought to the keynote is.

   

According to Engadget, Carmack gave audiences at WWDC07 a first look at Tech 5, id Software's new game engine. Details about the engine are still scarce, but Carmack did give audiences a peek at some of the features that come packed with Tech 5.

What we've got here is the entire world with unique textures, 20GB of textures covering this track. They can go in and look at the world and, say, change the color of the mountaintop, or carve their name into the rock. They can change as much as they want on surfaces with no impact on the game.

More details about Tech 5 are expected to surface come E3. Carmack also noted that the engine was being geared towards the Mac, PC, PS3, and Xbox 360 gaming platforms. Yes, the Mac. Carmack also revealed that another announcement involving the Mac would be made at E3.