New tests with the "fixed" version:

CPU + Density map on GPU: 15.870 s @ 83 fps
GPU: 1.726 s @ 10-32 fps (jumping fps, unsmooth-shading)
GPU + Weld on CPU: 4.818 s @ 102 FPS (A LOT IMPROVED, some shading abnormalities)

AMD Athlon64 X2 6000+
nVIDIA GeForce 9800GTX+
2 GB RAM
Win XP 32Bit

"Sometimes JCL reminds me of Notch, but more competent" ~ Kiyaku