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This page provides information on the MtlMulti material node.

Overview

The MtlMulti node allows you to assign different materials on a single mesh based on face IDs.

V-Ray for Houdini > V-Ray Multi ID Material > Houdini18_VRay5_VRayMultiIDmtl_render.png

Node

The MtlMulti node provides inputs for controlling various material properties. Some correspond to parameters in the section below.

mtl_# – Specifies a sub-texture to be used by the Multi Material. The number of available inputs is dependent on the Materials Count parameter.

V-Ray for Houdini > V-Ray Multi ID Material > Hou19_VRay6_MultiID_node.png

Parameters

Materials Count – Specifies the number of materials that are applied to the mesh.

Clear – Returns the Materials Count to a value of 0.

Material ID – Face material ID. It is filled automatically, if it is set to -1.

Wrap ID – When enabled, the material IDs are wrapped to the largest specified ID.

V-Ray for Houdini > V-Ray Multi ID Material > Hou19_VRay6_MultiID_parameters.png

Example

In the following example, we have a gingerbread cookies mesh with a V-Ray Multi ID Material assigned to it. The mesh has face IDs for the cream and the gingerbread parts.

V-Ray for Houdini > V-Ray Multi ID Material > Houdini18_VRay5_VRayMultiIDmtl_nodes.png

Here's how the gingerbread cookie turned out:

V-Ray for Houdini > V-Ray Multi ID Material > Houdini18_VRay5_VRayMultiIDmtl_render.png