The ideal scenario for a computer setup to enable large renders would be a system with at least 6GB of RAM and running a 64 bit operating system. This would allow Terragen 2 to use up to 4GB of memory, making high resolution rendering much more feasible. But the ability to render at such large sizes will also greatly depend on the complexity of the scene, even with an "ideal" rendering system. For scenes of low complexity, a 32 bit system with 2-4GB of RAM may work. For medium and especially high complexity scenes, 10,000x10,000 is unlikely to work unless you are on a 64 bit system with 6+GB of RAM. You will also be dealing with extremely high render times, so a quad core would be recommended as well.
TG 0.9 is less demanding on memory, but of course the results are also less realistic and the application as a whole is far less capable, so you are more limited in your scene creation ability. If you have the hardware to support it, TG2 would be recommended, though you'll also be looking at some very high render times, as I mentioned.
Out of curiosity, why do you need to render so large? The only possible use I can think of is for print, and at 300DPI (the typical maximum for any normal print process, and on the edge of reasonable human vision at average viewing distance), that would be a 33 inch square image, which is quite large even for posters. Most posters are also printed at a lower 150-220DPI, making an even larger printed size. Perhaps you don't need to render so large?
- Oshyan
