Material Editor > Maps rollout > Click a Map button. > Material/Map Browser > Smoke
Smoke is a 3D map that generates amorphous, fractal-based turbulent patterns. It's primarily designed for animated opacity mapping to simulate the effects of smoke in a beam of light, or other cloudy, flowing mapping effects.
Size—Changes the scale of the smoke "clumps." Default=40.
# Iterations—Sets the number of times the fractal function is applied. The higher the value, the more detail within the smoke, but the longer the calculation time. Default=5.
Phase—Shifts the turbulence within the smoke pattern. Animate this parameter to animate the movement of the smoke. Default=0.0.
Exponent—Makes color #2, representing the smoke, sharper and more wispy. As this value increases, the smoke "tendrils" become smaller within the pattern. Default=1.5.
Color #1—Represents the smokeless portion of the effect.
Color #2—Represents the smoke.
Because this map is usually used as an opacity map, you can adjust the luminance of the color values to alter the contrast of the smoke effect.