MaterialX is an open standard specification and library API, developed at Lucasfilm and Industrial Light & Magic, for describing and transferring rich material and look-development content between applications and renderers. MaterialX addresses the need for a common, open standard to represent the data values and relationships required to transfer the complete look of a computer graphics model from one application or rendering platform to another, including shading networks, patterns and texturing, complex nested materials, and geometric assignments.

WWW: https://www.materialx.org
