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This page provides information on the Multi Matte Render Element which creates red, green, and blue selection masks based on an object's Object ID or Material ID.

 

Overview

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With the Multi matte Render Element, only three colors are possible: red, green, and blue. In comparison, other matte render elements can include a multitude of colors to represent each material or object in a scene with a different color. With Multi matte, a single R, G, or B channel can be used directly as a matte, eliminating the step of selecting the color in the compositing software. This ease of use makes Multi matte a popular choice for compositors.

The Multi matte Render Element includes anti-aliasing.

To represent all the objects or materials in a scene with just the available red, green, and blue colors, several Multi matte Render Elements can be generated for a single rendering, each with different Material ID or Object ID settings.


UI Path: ||V-Ray|| > Render Elements > Multi Matte ID

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How to add a render element to a scene

Properties

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Mask Type – Specifies how the mask is generated:

Separate Channels – Considers all three Red, Green, Blue Ids.
White – Creates a mask only for the objects with the specified id.

Enable Deep Output – Specifies whether to include Includes this render element in deep images.

Id – When Mask Type is set to White, you can specify the id of the object to be masked.

Red/Green/Blue Id – Sets When Mask Type is set to Separate Channels, these parameters set the ID used for the respective channel.Use Multimatte ID – When disabled, Multi matte considers the Red Id, Green Id, and Blue Id values

ID Source – Specifies how the Red/Green/Blue Id are read.

Object ID – Multimatte considers the Red object ID, Green object ID, and Blue object ID values to be the Object ID and renders the R, G, and B channels accordingly.

When enabled, these values


Multimatte ID – The Red, Green, Blue Ids are considered to be the Material Id.

Affect Matte Objects – Determines whether to include matte objects when generating the render element.

Consider for Anti-AliasingAa – When enabled, anti-aliasing is used where possible.

Mode – Selects whether to include or exclude the specified objects in the list.

Exclude

List

Red/Green/BlueChannel Objects – Creates a list of objects/materials excluded from the respective channel.

Exclude List

Include Red/Green/Blue

as Inclusive Set

Channel Objects – When enabled, considers the Exclude List Red/Green/Blue as an inclusive set. All objects/materials not mentioned in the list are not rendered with this render element.

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