Luminosity Layer

• General
• Parameters
  • Luminosity Color
  • Luminosity Layer Transparency
  • Luminosity Layer Parameters
• Notes

General

A luminescent object can be seen even when there are no lights in the scene. It is self-illuminated. So the luminance layer channel in VRAYforC4D gives real light to the scene when using GI. You can put in it any HDRI texture, any image or shader.

It also has a transparency or mask, when the transparency is set to 100% the parts that are not luminance are transparent and the layers below the luminance channel get visible, when the transparency is set to 0% the dark parts of the channel are just shown dark.

 

The luminance channel can be used to lighten a material, to make an object emit light, to make parts of an object emit light (like luminescent letters on a digital sign p.e.), and it can also be used to insert images (in the background p.e.) that should have a certain lightness, in the texture multiplier you can set values far over 1 to simulate real light or to give more power to textures. the result is a HDRI like effect. You can also use the filter shader p.e. to set the gamma of an image or to set the exposure of an HDRI image.

Parameters

Luminosity Color

Color - this is the luminosity color of the material.

 

Amount - use this setting to adjust the brightness of a channel color. The Brightness setting functions somewhat like a multiplier and can be set to greater than 100%.

 

Texture Map - here an image texture or shader can be defined, also in luminosity layer you can put as texture map HDRI on a sphere or skydome to lighten your scene with HDRI or shaders.

 

Amount - this is the multiplier for the texture. Note that this does not affect the Color.

Luminosity Layer Transparency

Transparency Color - this is the transparency color of the material. 

Amount - use this setting to adjust the transparency of a channel. use this setting to adjust the transparency of a channel.

Texture Map - here an image texture or shader can be defined.

Invert - This option simply inverts the Texture Map, so transparent and solid areas are reversed. This works for both clipped images and images with built-in alpha channels.

Luminosity Layer Parameters

Double Sided- 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 Luminosity Layer 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.