User Guide > Rendering and Render Setup > Shading > Shading Nodes > Material nodes - Maya software > Volumetric materials > 
Volume Fog
 
 
 

Find this material in the Create bar.

Apply this material to volumetric primitives to create effects such as spherical, conical, or cubicle smoke, fog, or dust. For more information on strategies, see Create > Volume primitives.

Color

Assign a color or map a texture to the volume. To use the color ramp, see Ramp.

Transparency

Represents the amount of the volume’s Transparency.

Incandescence

To make a material appear as if it were emitting light, such as lava or a phosphorescent moss. A slight touch of incandescence on vegetable matter, for example, can make the vegetation look alive. The color is black by default, which has no effect on the surface.

NoteAlthough a surface appears to glow when you apply Incandescence, it does not act as a source of light in the scene. See also Glow Intensity.
Glow Intensity

As you increase this value, the material seems to glow and is surrounded by a faint halo of light. Glow Intensity is different from Incandescence in two ways:

Dropoff

Dropoff Shape

Select either the Cone, Sphere, Cube, or Light Cone as a shape used to define an outer boundary to create a soft-edged volume. For example, if rendering a box volume, Cube should match the edges of the volume.

NoteLight Cone is different from Cone—the dropoff (or fade) occurs near the point of the cone.
Edge Dropoff

Defines how suddenly the density falls off near the edges defined by the Dropoff Shape. A value of 0.0 results in a hard edge with no dropoff. A value of 1.0 results in smooth density fade from the edge to the center of the volume.

Axial Dropoff

Defines the density dropoff down the center axis of a cone. Higher values make the fog less dense further from the peak of the cone. (Only works with Cone shapes).

Dropoff Method

Select one of the following options:

Scale Opacity

Multiplies the overall density by the fade value, causing a uniform change in transparency.

Subtract Density

Subtracts the fade value multiplied by the Dropoff Subtract value from the density. Useful when density or transparency is textured. Low density regions become completely transparent, while high density regions are not very affected. This can help preserve the character of a fluffy cloud, for example.

Dropoff Subtract

The maximum amount of density subtracted from the volume when Dropoff Method is Subtract Density. If the volume density is 1.0 and Dropoff Subtract is 1.0, the edge of the volume is completely transparent.

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