Mattistic Plume parameter overview (OFX version)

The following list gives a basic description of the available parameters of the Mattistic Plume plugin for OpenFX hosts organized by category.

General

Manage License: Opens a window to view the license status and activate a license (requires an internet connection).
Use GPU if available: When enabled the plugin will try to use the graphics card to greatly accelerate rendering (requires CUDA or OpenCL).
voxel resolution: Affects how many voxels are generated which determines how detailed the end result will be. Every step doubles the amount of voxels. Higher values lead to longer render times.
samples/voxel: How many samples to take for every voxel a camera ray passes through. Increasing this can help reduce sampling artifacts.
Mask: An external image input that is applied as a mask when compositing the render over the source.

Time

Camera

location: The world location of the camera.
rotation: The world rotation of the camera.
rot. order: The order in which the rotation around the X, Y & Z axes are applied.
focal length: The focal length of the camera in mm. This determines the field of view in combination with the sensor size.
sensor size hor.: The horizontal size of the sensor in mm.
sensor size ver.: The vertical size of the sensor in mm.
sensor fit: Determines how the image aspect ratio is fitted to the sensor aspect ratio.
motion blur: The amount of directional blur applied to fast movement. This is not true motion blur but an approximation applied as a 2D effect.
exposure: A scaling factor for the brightness of the rendered image.
white balance: The temperature in K that is considered white. Higher values add more red/orange tones to the image while lower values add more blue.

Direct lighting

key loc.: The world location of the key light source. This is a point light without any falloff over distance.
key color: The color of the key light source.
key scale: A scaling factor for the amount of light that is emitted by the key light source.
fill loc.: The world location of the fill light source. This is a point light without any falloff over distance.
fill color: The color of the fill light source.
fill scale: A scaling factor for the amount of light that is emitted by the fill light source.
shadow color: The color of the shadow cast by the smoke on the ground plane.
shadow density: The density of the shadow.

Indirect lighting

ambient color: The color of the ambient light uniformly illuminating the volume. Fast but inaccurate.
ambient scale: A scaling factor for the amount of ambient light the volume receives.
scatter samples: The number of samples to take to simulate light bouncing around inside the volume (aka multiple scattering). Slow but accurate.

Smoke

color: The color of the smoke when illuminated by a white light.
absorption: A scaling factor for how quickly light is absorbed by the smoke as it shines through it.
density: Scales the density of the smoke. This also impacts the brightness of the flames as some smoke is needed for the flames to be visible.
diffuse: The density of a diffuse layer around the plume.

Fire

heat: Scales the temperature of the fire. This influences both the brightness and the color of the flames. The actual brightness also depends on the smoke density and fire brightness parameters.
brightness: Scales the brightness of the fire. The actual brightness also depends on the smoke density and fire heat parameters.
saturation: The amount by which high values of the flames are desaturated.
transition: The exponent of the transition towards the surface of the flame. Higher values lead to thinner flame surfaces.
dissipation: The exponent of the transition away from the surface of the flame. Higher values lead to thinner flame surfaces.

Shape

scale: World scale of the volume.
offset: World offset of the volume.
rotation: World rotation of the volume around an upward pointing axis.
length: The length of the plume.
bend: The curvature of the plume.
knee: The point along the plume, from the bottom up, that marks the center of the curvature.

Look

random seed: An initial value for the random number generator used to generate the turbulence and fuel variation.
base radius: The radius of the plume at its base.
top radius: The radius of the plume at its top.
spread: The amount by which the puffs of smoke spread out from the center of the plume.
motion: The speed by which the puffs of smoke rotate around themselves in the shape of a ring.
fade in: Reduces the density of the plume near the base.
fade out: Fades out the plume towards the top.