2008

Effect of changing Flame Density
Value=10, 60, 120
Samples Sets the rate at which the effect is sampled. Higher values produce
more accurate results but take longer to render.
You might consider raising the samples value under the following conditions:
■ Flame Size is small.
■ Flame Detail is greater than 4.
■ Any time you see color banding in the effect. The chance of color banding
increases if a flat surface intersects the fire effect.
NOTE 100 percent transparent objects that intersect the effect become partially
visible. To use particles with Fire, consider using 3D particles instead of
opacity-mapped particles.
Motion group
Use the parameters in the Motion group to animate the churning and rise of
flames.
Phase Controls the rate of change for the fire effect. Turn on Auto Key and
change the phase value at different times.
Phase value can have several meanings, depending on the state of the
Explosion check box.
■ If you clear Explosion, Phase controls the churning of the fire. The faster
the value changes, the more furiously the fire burns. If the Phase function
curve is a line, you get a steady burning fire.
6504 | Chapter 19 Effects and Environments