The Fire effect creates procedurally generated flames. There are numerous settings to control the behaviour and appearance of the fire.
Fire regions
There are three definable regions for the fire: flammable region, blocking region and burn direction. If you leave these blank the fire will use the entire layer as its source (excluding transparent areas).
If you select a layer and channel for any of the regions or the direction the fire will be influenced by those elements. This way you can use layers such as gradients to further control the fire’s behaviour.
Simulation
- Seed – creates a different random variety of fire.
- Iterations – more iterations will create a more realistic simulation of the fire’s movement.
- Pre-start – by default the fire starts on the first frame of the layer. This enables you to start the fire before the first frame.
- Flammable end – determines when the fire is no longer visible.
- Source scale – changes the size of the fire source elements.
- Source variation – adjusts how often the fire changes formation. Low variation will create a smoother, less volatile fire.
- Source fill – changes the density of the fire.
- Movement – changes the length of the flames.
- Source noise – adjusts the random density of the flammable region.
- Source intensity – adjusts the density of the flammable region.
- Reload maps – activating this property creates a more realistic simulation when the flammable region is animated.
- Source position – moves the entire fire simulation. When combined with 2D tracking this can create more realistic composites into videos with moving cameras.
Wind
Wind can be applied to the fire to push the flames in a particular direction.
Appearance
The color and blend method of the fire can be altered here.
The temperature settings change the intensity of the fire. A lower low temperature will reveal more detail in the flame.