HiRes renders can be taken quite easily:
1) Make a graphics window of 1000x1000
2) Set camera zoom to 32x (or whatever the correct factor is)
3) You can now make a loop which rotates the camera to each of the 1024 (=32x32) sectors which each are 1000x1000 pixels, and save the BackBuffer() to disk
4) Now you have 1024 png files, which you can merge into one huge 32000x32000 pixel png file
I just realized, that you can use the same technique for extreme good looking anti-aliasing, which works also with deferred rendering.
You can have 4x, 9x, 16x, 25x, 36x, 49x, 64x, 81x, 100x, etc... HRAA (=HiRes Anti-Aliasing)