In Poser 8, I've done 5000x5000 pixel renders with very high quality settings, containing a V4, clothes, and some scenic props and had no problems, and I've done 2500x2500 pixel renders of similar complexity and had Poser choke, or simply close down before the render finished. My only guess is that something in the scene is causing a problem, and it might not be something which is obviously huge/complex. Possibly AO or reflections on some props can be the death of a high resolution render...

Quote - I have managed 3000 x 2400 on my desktop machine with just 512 mb of real memory.

Thats just under 22 mb to store the image in memory.

Try checking task manager when Poser is running and watch memory use.

Yeah, I used to do that. I would render in a separate process (which helps a lot, btw), and watch to see if the memory of FFrender.exe approached 4gb. If it did, the render would not complete because right around 3.9gb, the render would always close. Thankfully, this isn't a problem for me in Poser2010.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.