This page provides information on the V-Ray Falloff Texture.
Overview
Falloff produces a texture with values from white to black, based on the angular falloff of the geometry surface based on the face normals.
Any texture can be replaced via the Replace With New Texture (
) button, which activates when you select the texture to be replaced. If the texture is an instance, all copies are changed as well.
UI Paths
||V-Ray Asset Editor|| > Textures (right-click) > Falloff
||V-Ray Asset Editor|| > Create Asset (left-click) > Textures > Falloff
Parameters
Color A – Controls the front color. When a texture is selected, it overrides the color as long as the texture checkbox is enabled.
Color B – Controls the side color. When a texture is selected, it overrides the color as long as the texture checkbox is enabled.
Falloff Type – Specifies the method for determining falloff range:
Perpendicular/Parallel – Sets the falloff range based on a 180-degree change in face normal direction.
Towards/Away – The falloff range is based on a 180-degree change in face normal direction.
Fresnel – Sets the falloff range based on the IOR (Index of Refraction). The color range is controlled by the IOR.
Distance Blend – Sets the falloff range based on the distance that is specified from the camera.
Direction – Specifies the direction for defining falloff:
View Z – Defines the falloff based on the camera viewing direction (camera Z-Axis).
View X – Defines the falloff based on the camera X-Axis.
View Y – Defines the falloff based on the camera Y-Axis.
Explicit – Defines the falloff based on a defined position.
Local X – Defines the falloff based on the local X-Axis.
Local Y – Defines the falloff based on the local Y-Axis.
Local Z – Defines the falloff based on the local Z-Axis.
World X – Defines the falloff based on the world X-Axis.
World Y – Defines the falloff based on the world Y-Axis.
World Z – Defines the falloff based on the world Z-Axis.
Invert – When enabled, inverts the color values.
Direction (Vector) – Defines a specific direction when falloff Direction is set to Explicit.
Fresnel IOR – Defines the IOR (Index of Refraction) used by Falloff. This option is available when Falloff Type is set to Fresnel.
Far Distance (A) – Specifies the far distance value. Available when Falloff Type is set to Distance Blend.
Near Distance (B) – Specifies the near distance value. Available when Falloff Type is set to Distance Blend.
Extrapolate – When enabled, the falloff effect continues beyond the Near and Far distances. Available when Falloff Type is set to Distance Blend.
Mix Curve
Mix Curve – Enables the use of a mix curve. It allows you to choose whether to use the blend input texture(s) to blend the two colors.
Tangent Type – Specifies the handles type of the selected curve control point.
None – No handles.
Free – The handles are unlocked.
Locked – The handles' angle and length are locked.
Position – The position of the selected curve control point. The position cannot surpass neighboring points or their tangent handle positions.
Value – The value of the selected curve control point.
Right-click on a curve control point to open the following menu options:
Delete – Deletes the curve control point.
Tangent Type – The same as the Tangent Type parameter.
Right-click on the curve or anywhere in the field to open the following menu option:
Reset – Resets the mix curve to its default state, removing all curve control points that have been created.
Multipliers
Mode – Specifies the multiplication mode of the colors.
Multiply– The color used for blending is black.
Blend Amount – The color used for blending is the one specified in the color slot.
Color A – Blends between a color and a texture, if specified.
Color B – Blends between a color and a texture, if specified.
Footnotes
- – Calculated in the default SketchUp unit - inches.