VRayLightMtl parameters

General

Parameters

Notes

 

Search Keywords: light material, self-illumination 

General

The VRayLightMtl is a special material provided with the V-Ray renderer. This material is generally used for producing self-illuminated surfaces. It also allows faster rendering rather than with a Standard 3ds Max material with self-illumination enabled.

Parameters

Color - this is the self-illumination color of the material.

 

Multiplier - this is the multiplier for the Color. Note that this does not affect the texture map, if specified.

 

Texture - a texture map to use for the self-illumination color. 

 

Opacity - a texture to use as opacity for the material. Note that making the material less opaque does not affect the intensity of the self-illumination color. This is so that you can create perfectly transparent materials that nevertheless still emit light.

 

Emit light on back side - checking this option makes the object emit light from its back side as well. If this is off, the material is rendered as black on the back sides.

Notes

• You can use the VRayLightMtl as a light source assigned to an object. Increasing the multiplier will affect the GI solution and will produce more light. Note that overbright colors may look the same as pure white but the GI results will be different. For more information see the Examples section.


• If you know the photometric power of a self-illuminated object in lumens (e.g. 1700 lm for a 100-watt bulb) you can calculate the multiplier for VRayLightMtl if you divide the lumens by the surface area of the object in meters (the 3ds Max Measure utility can be used for this), provided that the self-illuminated color is pure white.