Well, the first 3D game I played was "3D Monster Maze" on the ZX81 - black and white, graphics resolution 64 x 48 - so I'm under no illusions as to how fast technology develops... BUT... I think we're still a long way from having games that come even close to the stuff that can be produced (as stills) in Bryce. Not even the giant render farms can ray-trace anything but the simplest animation in real-time, and they are 50,000X + more powerful than the PC on your desk. Bear in mind that 99% of the Doom3 screenshots doing the rounds are just cut-scenes with pre-rendered textures - not even in-game shots - and the process involved is completely different to the process of ray-tracing. They are real time, I know, but the thousands of hours of texuring and rendering and lighting calculations have already been performed - apart from basic illumination, shading and movement, it's all been done. I don't reckon the current silicon computer architecture is capable of producing real-time photorealism on a single machine, simply because there's a physical limit to the speed a silicon computer can function (i.e. the speed of light). I think there will need to be a new form of computer for real-time realism (!) to become a reality - maybe a quantum computer - either that or someone will need to find a way to exceed the speed of light. ...And yes, I know they already have, but I mean within the architecture of a computer. Hey, but I still like 3D Monster Maze!...