MaterialX Data Libraries

The following is the layout of the definitions and implementations provided as part of the core libraries.

genglsl : Support for GLSL code generation
genosl : Support for OSL code generation
osl : Reference OSL implementations

Standard Library

stdlib
- stdlib_defs.mtlx : Single node nodedef definitions file.
- stdlib_ng.mtlx : Node graph definitions file.
- genglsl: GLSL language support.
  - lib : Shader utility files.
  - stdlib_genglsl_impl.mtlx : Mapping from definitions to implementations
  - stdlib_genglsl_cm_impl.mtlx : Minimal set of "default" color management implementations.
  - GLSL implementation files.
- genosl: OSL language support.
  - lib: Shader utility files.
  - stdlib_genosl_impl.mtlx : Mapping from definitions to implementations
  - stdlib_genosl_cm_impl.mtlx : Minimal set of "default" color management implementations.
  - OSL implementation files.
- osl: OSL reference implementation
  - OSL implementation files.

Physically-Based Shading Library

pbrlib
- pbrlib_defs.mtlx : Single node definitions file.
- pbrlib_ng.mtlx : Node graph definitions file.
- genglsl : GLSL language support
  - lib : Shader utility files.
  - pbrlib_genglsl_impl.mtlx : Mapping from definitions to implementations
  - GLSL implementation files.
- genosl : OSL language support
  - lib : Utilities
  - pbrlib_genosl_impl.mtlx : Mapping from definitions to implementations
  - OSL implementation files.

Support Notes:

GLSL language support is for version 4.0 or higher.
"default" color management support includes OSL and GLSL implementations for the following non-LUT transforms:
- lin_rec709, gamma18, gamma22, gamma24, acescg, srgb_texture
Basic GLSL lightshader node definitions and implementations are provided for the following light types:
- point, directional, spot
Code generation is not currently supported for:
- ambientocclusion node for: genosl and genglsl.
- arrayappend node for: genosl and genglsl.
- curveadjust node for: genosl and genglsl.
- displacementshader and volumeshader nodes and associated operations (add, multiply, mix) for: genosl and genglsl.