ecurtz has released a “Two Pass 3D Rendering” Demo for the Nintendo DS.

The release notes:

Here’s the promised two pass 3D demo, it took me longer than I expected to get it finished. Unfortunately, I still can’t get it working with only one bank of VRAM – I’ll send a shiny new DS game to anyone who can get that going…

http://forum.gbadev.org/viewtopic.php?t=7958