AcademySoftwareFoundation / OpenPBR

Specification and reference implementation for the OpenPBR Surface shading model

AcademySoftwareFoundation/OpenPBR Issues

Add formula for the average albedo of the F82-tint model
Updated 2 months ago2
Emission units
Closed 2 months ago30
Proposal: dual specular roughness sliders with mix
Updated 2 months ago2
Proposal/Request: Decouple coat roughness from transmission/refraction
Closed 2 months ago4
subsurface_radius_scale should maybe be a color (not a vector3)?
Updated 2 months ago
Visual discontinuity at `transmission_depth` of zero
Updated 2 months ago7
Layer inconsistencies between the whitepaper and the reference implementation
Closed 2 months ago3
Proposal: Fuzz/sheen can darken as well as lighten
Updated 2 months ago3
Default value of transmission_dispersion_abbe_number is not between uisoftmin and uisoftmax
Updated 2 months ago2
Better approximation for darkening layers under coat
Updated 2 months ago17
Suggest separate parameters for diffuse and metal colours instead of "base_color"
Updated 2 months ago13
Purpose of base_weight and specular_weight?
Updated 2 months ago5
State white-furnace test behavior
Closed 2 months ago2
Anisotropy parametrisation
Closed 2 months ago6
Anisotropy direction parametrization
Closed 2 months ago26
Spec/coat roughness ranges should be [0,1]
Closed 2 months ago
Coat/specular IOR defaults, and TIR issue if coat IOR > spec IOR
Closed 2 months ago3
Clarify handling of rays incident to the surface from the interior
Closed 2 months ago3
Normal maps
Closed 2 months ago8
transmission/translucent volume parametrization
Closed 2 months ago7
specular_color should not generate a complementary color
Closed 2 months ago1
Merge specular_weight and specular_ior_level
Closed 2 months ago1
Oren-Nayar roughness parametrization is not sufficiently clear
Closed 2 months ago5
subsurface weight has incorrect uifolder
Closed 2 months ago1
Minor errors in Glossy-Diffuse section
Closed 3 months ago
Thin film in micrometers divided by 2 for normalized parameter range
Closed 3 months ago4
Implementing thin-film interference in combination with F82-tint metallic Fresnel
Closed 3 months ago3
Glossy-diffuse slab description as a gloss layer is possibly confusing
Closed 3 months ago3
question regarding color value range enforcement
Updated 4 months ago51
Parameters related to volume shading have not been used in MaterialX implementation
Closed 5 months ago1
Should non-physical tinting affect lower layers?
Updated 5 months ago3
Suggest "presence" or "coverage" instead of "geometric_opacity"
Updated 5 months ago2
Update transmission in default example material
Closed 5 months ago
Dielectric priority?
Closed 5 months ago2
Suggest "0.18" as the default base_color
Updated 5 months ago2
Fuzz normal when layered on top of coat
Updated 5 months ago3
Spec version metadata
Updated 5 months ago5
Handling of raytraced subsurface entry/exit bounces
Updated 5 months ago2
Splitting specular_color between dielectric tint and metallic edge color
Updated 5 months ago2
Ability to tint specular highlights without affecting grazing angles
Updated 5 months ago4
Allow IORs below 1?
Closed 5 months ago6
transmission_extra_roughness
Closed 5 months ago4
Anisotropic roughness in MaterialX implemetation differs from the specification
Closed 5 months ago1
MaterialX reference implementation errors
Closed 5 months ago2
For consistency, every section should have a "weight" parameter.
Updated 8 months ago2
Transmission depth and subsurface radius don't have suggested bounds
Closed 9 months ago5
Define unspecified BSDFs
Closed 9 months ago3
Ordering of the parameters
Closed 10 months ago1
Definition of angle for F82
Closed a year ago3
MaterialX implementation
Closed a year ago1