Long Story short.
After hours spend on readings, coding and calculations I have got simple, bit slow but working Smoke effect.
Grid 96^3
FPS 25 – 30 on ATI Radeon HD 5700 Series which lets face it is a crap.
Next step – rewriting code, trying to make it bit more flexible and implement it to polygon based scene.
pieknie! tylko dalej nie moge zrozumiec czemu tlo nie jest ciemne. 😛 🙂