Gradient Ramp

Gradient Ramp is a texture map that can easily create and edit gradients –  useful in many different situations.

UI Path: ||V-Ray Node Editor|| > Shader > Add > Textures > V-Ray Gradient Ramp

This section describes the input sockets of the node. Some sockets have dedicated parameters, which are further described below, and some sockets are just inputs.

Mapping – Allows a UVW Mapping, or a UVW Randomizer node to be connected to determine the mapping of the ramp.

Texture Map (input socket) – Determines the texture map to be used when the Gradient Type is set to Mapped.

Gradient Position (input socket) – Allows an integer-outputting node to be used to determine the Pos value.

Texture 1, 2... (input socket) – Allows maps to be connected as the colors in the Gradient Ramp.

Gradient Type – Specifies the type of gradient ramp to create:

Four corner – A gradient that transitions linearly between colors assigned to each corner. 
Box – A gradient with a box radial transition.
Diagonal – A gradient with a diagonal transition.
Lighting – A gradient based on the light intensity.
Linear – A gradient with a simple linear transition.
Mapped – Uses map as a gradient. The map is specified in the Texture Map input socket.
Normal – A gradient based on surface normals and the camera.
Pong – A gradient with a diagonal transition that repeats in the middle.
Radial – A gradient with a radial transition.
Spiral – A gradient with a circular transition.
Sweep – A gradient with a linear sweep transition.
Tartan – Creates a gradient with a plaid pattern.
Position – Allows the user to specify a Gradient Position.

Color ramp

+ – Adds a color stop to the ramp.

- – Removes the currently selected color stop from the ramp.

v – Opens additional tools for the color ramp.

Color Mode – Determines if the colors are either in the RGB, HSV, or HSL color space.

Interpolation – Determines the type of blending between the color stops.

Active Color Stop – Allows for quick switching between color stops based on their position in the ramp.

Pos – Determines the position of the blend between the color stops, where 0 is all the way to the left, and 1 is all the way to the right.

Color – Determines the color of the currently selected color stop.

Compatibility – Allows you to match the result of the texture in Blender to that in either 3ds Max or Maya. If Alpha From is set to Maya:

3ds Max – The resulting alpha of the texture is the intensity of the texture.
Maya – The resulting alpha of the texture is the color luminescence.

 Alpha From Intensity – Determines how the alpha of the result is calculated:

Force 1.0 – Alpha is always 1.
Compatibility – Depends on the selected Compatibility option.
Self – The calculated alpha of the texture.

Invert – When enabled, inverts the colors in the final result.

Invert Alpha – Inverts the alpha channel if Invert is also enabled.

Color Mult – Corrects the color of the texture by multiplying the color values in the texture with the color values specified here. 

Color Offset – Corrects the texture's color by adding the color values specified here to the color values of the texture. 

Alpha Mult – A multiplier for the Alpha value.

Alpha Offset – Controls the offset of the Alpha value.

No UVs Color – Specifies a default color used for polygons with no valid UVs. In case the map is not tiled, specifies a default color that is used outside the texture square.  

Placement Type – Select how to place the texture.

Whole Texture is Valid – Uses the full valid portion of the texture.
Crop – Allows the user to specify a section of the texture using the parameters below. 
Place – Allows the user to specify a section of the texture and how to place it using the parameters below.

U – U coordinate of the texture sector.  

V – V coordinate of the texture sector.  

W – W coordinate of the texture sector.  

H – Specifies the height of the texture sector. 

Jitter – Specifies a randomization value for the UV placement.

Tile U/ Tile V – Enable to choose between horizontal or vertical tiling. 

UV noise on – Enables UV noise.  

Animate UV noise – If enabled, the noise is animated. Use the UV noise phase to animate the noise.

UV noise amount – Specifies the UV noise amount. 

UV noise levels – Specifies the UV noise iterations. 

UV noise size – Specifies the UV noise size.  

UV noise phase – Specifies the UV noise phase.  

UV Noise Phase – Specifies the UV noise phase.  

Noise Amount – Determines how much noise is introduced.

Noise Type – Specifies how the colors are randomly distributed across the gradient.

Regular – A plain noise with a non-fractal function.
Fractal – A fractal algorithm to generate the noise.
Turbulence – A turbulence-based noise type is used.

Noise Size – The scale of the noise.

Noise Levels –  Determines the amount of iterations of noise.

Noise Phase – Controls the speed of the procedural noise.

Noise Low Threshold – Sets the Low threshold.

Noise High Threshold – Sets the high threshold.

Noise Smooth – The amount of smoothing of the noise.