LudwigFriedmann

[Intel® Open Image Denoise](https://www.openimagedenoise.org/), [(GitHub Repository)](https://github.com/OpenImageDenoise/oidn) provides means for image denoising, which may become a valuable (but optional) post-processing addition to the pathtracer.

Just recently, some interesting extensions have been added to glTF: - [KHR_materials_ior](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_ior) - [KHR_materials_volume](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_volume) - [KHR_materials_specular](https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_specular) It should be examined to what extent these extensions are compatible/overlapping with OpenMATERIAL.

A generic concept for the integration of incident-angle dependant BRDFs (Bidirectional Reflectance Distribution Functions) / BSDFs (Bidirectional Scatter Distribution Functions) shall be introduced in OpenMATERIAL. A global transparency Boolean distinguishes...