I made this particle smoke system for my special effects class. I'm especially happy with it because I made the graphic for the particles myself. I started with this simple cloud which didn't look that realistic, but then I started to smudge the edges so it would be a less obvious shape. This made the cloud parts that were sort of sticking out, resembled smoke escaping the airflow due to turbulance of other smoke. It's an effect you can clearly see if you smoke a sigarette and use your hand to block the smoke traveling upwards. I retouched the particle to accentuate this effect and this is the results, enjoy.
PS: Smoking is bad for you =D
