As for 3D:
- Faster (Although currently very slow with lots (500+) objects on screen but this is fixed in Patch 4)
- BSP support (Reasonable but geometry is sometimes screwed up and BSPs cause lots of other problems eg ghosted objects ghosting the BSP as well)
- Particle engine (Pretty good actually)
- Shaders (Which don't work half the time)
- Blending FX (Powerful features with sod-all flexibility)
- Terrains (Terrains are pretty half-assed though with very few commands, will be extended around Patch 6 or 7)
generally the memblocks & TPCs are useful for general DBP work (they actually work and have been used to great effect

)
NOBODY has a forum name as stupid as Darth Shader. I do.