This post is very old. Please bear in mind that information here might be incorrect or obsolete, and links can be broken. If something seems wrong, please feel free to comment or contact me and I'll update the post.
Well, I just got an answer on a question about virtual texture mapping from John Carmack himself! Woho! I’ll never remove it from my inbox again 
A great finish for a quite nice day.
Related posts:
that’s cool