Versions Compared

Old Version 4

changes.mady.by.user Kristin Ivanova

Saved on

compared with

New Version Current

changes.mady.by.user Gergana Lilkova

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

V-Ray implements it as a switchable model in the V-Ray Material. Currently, it 's not is supported partially with V-Ray GPU. 


Layer Structure

...


Section
Column
width40%

The main difference between the V-Ray material model and OpenPBR is the layers' structure. See the diagram for information on how OpenPBR's layers are calculated.

Fuzz Layer

OpenPBR's topmost layer is Fuzz, which is based on the "Practical Multiple-Scattering Sheen Using Linearly Transformed Cosines"; Tizian Zeltner et all; Siggraph 2022 paper. The Fuzz layer is calculated by itself, unlike in V-Ray Material, where Sheen is coupled with the Diffuse layer. The OpenPBR's Fuzz affects the Coat, Reflection, Refraction, and Diffuse layers, but is not affected by them.

Coat Layer

The Coat layer has an additional parameter, which controls anisotropy.

The Coat parameter simulates a clear, glossy top layer often found on materials like car paint or varnished wood. This layer reflects light, enhancing the visual depth of the material, and adds realism by mimicking physical coatings in the real world.

Column
width5%


Column
width55%

...