LuxCoreRender Materials Matte Translucent

Matte Translucent is an extension of the matte material that also allows for transmission of light through the material. It is not shiny and transmitted light will obscure details. It is well suited to plastic lamp covers, where glossy translucent would simply add calculation time, as well as dull polymers, some dull organic materials (such as cheese or banana peels) and some kinds of textiles.

Options

Reflection Color

This is main color, it specifies the color of light that is scattered off the surface of the material. Any leftover light will pass through the material. That means you will need to specify a darker reflection color to get a highly translucent material. For a dark material, select a low reflection color and a low transmission/volume color and that will make the material absorb light.

Transmission Color

This determines the color of light that transmits through the material. For best results, you should leave this as 1.0 (full white) and assign a volume to the material and use that to give the material its internal color. This allows for volumetric color absorption and subsurface scattering. Color from the transmission setting is applied uniformly to transmitted light, and can make your object look unnaturally uniform in color, so using a volume is recommended.

Sigma

The sigma parameter determines how rough the surface appears, with zero being perfectly smooth. A very rough material will have a sigma of no more than 30 degrees in the real world. The rougher the surface the more light is reflected back at grazing angles, giving it a flatter look.