Some fun with touchdown smoke colorOne of the interesting things that was done with the Fresnel reflection tweak a little while ago in this forum were changes that could be made to the appearance of water reflections. It

PS: Anybody know why touchdown smoke is whitish to bluish but a burning tire produces black smoke?Because it is burning. :-p

LOLGood answer !!WOZ

Hey wait a minute. A car hoon spins his rear wheels and he's "burning rubber" but the smoke is white/bluish not black.? It still doesn't explain it.Anybody else.?

OK This appears to be the answer people:http://washsta.com/modules.php?name=News&f...article&sid=477Quote:In the black smoke, the particles were tiny clumps of carbon. Carbon is the black stuff that was left behind when you burned the paper. With the rubber, the carbon went up as smoke instead of being left behind. That gave us the nice, black smoke.With paper, the smoke particles are more complex. They are a combination of water droplets (formed from the burning cellulose in the paper) and a variety of chemicals produced as the cellulose got hot enough to break apart. This process of using heat to break chemical apart is called pyrolysis. The combination of water drops and unburned fuel particles give the smoke a white color. Did you notice that while the paper had a flame, it did not make much smoke? While there is a flame, the fuel particles burn instead of becoming part of the smoke.Cheers WOZ