This post nothing to do with it loaded intro memory, but filesize itself.
Now, a 32,768 x 32,768 iamge takes up around 384meg. This is an uncompressed .TGA file.
Now, remember everybody that since Quake 3, id engines have used compressed zip file archives. Quake 3 used pk2, Doom 3/Quake 4 used pk4. Both the same thing, just a renamed zip file.
Ok. What does this mean? Well, using Winzip, I got a 32,768x32,768 image that was 384meg to compress into 276meg . THATS ALL.
So, with 12 maps (I think?) shipping with the game, that means that 3,312meg is taken up by terrain. ONLY 3,312meg. Not hundreds of gig like you all seem to think it will be.
3,312 meg for terrain texture. Which TBH isn’t bad. And thats with a poor compression, nothing amazing, and thats with no extra compression things that they will probably be using.
Add that to the size of the actual game (Which will probably be between 3-4gig) and you have a 6-7gig game size. Thats still ONE DVD.
So stop worrying about filesizes so much. Yeah Terrain will take up quite a bit, but nothing amazing.