A simple image like that shouldn't give you out of memory problems. Check out the attached image, rendered on a 2Gb RAM machine. Original size 1100x1029, scaled down for posting only. All textures used are at least 1024x1024, some 2000x2000 and some even higher. No gimmicks used, complete scene rendered completely in Poser (mind you, I've done way larger scenes then this one). Took 1 hour to render on my machine. I forgot how many lights I did use, but it's over 20 and at least half of them cast shadows. The image even used volumetric rain (3 instances for the best effect), not just an overlay.

The secret? As little applications and processes running as possible, in essence only firewall, anitvirus and display stuff. New startup before rendering, load scene render right away. Scale down as many textures as possible, but I never scale down under 1024, but this image used as stated before still some large textures.

My machine: WinXP home (good old 32 bit) SP1 (yes, no service pack 2 on my machine, it's a resource eater), 2Gb Ram, Athlon64 3500+, lot's of GB free harddisk space (at least 12Gb on the one where WinXp has been installed on. Poser is installed on a different harddrive), ATI Radeon X1550 512Mb (Everyone says the gfx card is not important for rendering, but it has an effect on the the way your cpu and ram is being used. The better the gfx card, the more memory on the gfx cars itself, the more efficient your cpu and ram will be used, since the gfx crd will take away some of the stress on it).

Why am I giving you my specs also? Well they're part of the secret also. When it comes to Poser, it's one of the best setups you can use. Granted, it may not be the fastest anymore, but it is the most efficient one and that counts. Where high end machine fail to render large scenes or high resolution, my good old outdated beauty still preforms fine and outshines all the $$$$ spent.

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk