> If I'm running on a 64-bit system with 20 gigs of ram, does > VTK take full advantage of that 20 gigs? I know that, for 32-bit systems, I > have to set some flags to get it to go past the 2 Gig limit. For 64 bit VTK on x64 you will not have this problem. If your application is 32 bit there still will be a limit. John