This page provides information on the MtlSingleBRDF material node.
Overview
This node enables a BRDF material to be double-sided. It also enables materials to be transparent except in the case of specific ray types.
By default, all V-Ray BRDFs are connected to an automatically-generated MtlSingleBRDF in the VRScene before assignment to the Node plugin holding the geometry.
Node
The MtlSingleBRDF node contains the following input:
brdf – Specifies the BRDF material that will be affected.
Parameters
Mode – Specifies one of the following behaviors for the material:
Single-sided – The lighting on the 'outer' side of the material is computed. You can use this to achieve a fake translucent effect for thin objects like paper.
Double-sided – V-Ray flips the normal for back-facing surfaces with this material.
Transparent For Camera Rays – The material is not visible to camera rays.
Transparent Except For Shadow Rays – The material is invisible to all rays except for shadow rays. This allows it to still cast shadows.
Transparent Except for Shadow/Refracted Rays – The material is invisible to all rays except for shadow and refraction rays. This allows it to cast shadows and be seen in refractions.
Filter – Specifies a color filter to tint the material.
Allow Negative Colors – Enables the use of negative values in the color swatches of the connected BRDF.
Env. Fog. Mode (USD) – Sets up environment fog in Solaris/USD. A V-Ray EnvironmentFog node must be added to the usd_env_fog slot of the material. Download these Test Scene files to try the mode.
Env. Fog – The fog effect is applied as an environment fog in Solaris/USD.
Volume Fog – The fog effect is applied to a specific object only in Solaris/USD.
