Issues

• Titanium color may have been mis-transcribed

  AcademySoftwareFoundation/OpenPBR#324 · Filter by author EvanBalster opened on Oct 9, 2026

• Incorrect symbol displayed on math formula

  AcademySoftwareFoundation/OpenPBR#323 · Filter by author proto-solarian opened on Oct 3, 2026

• specular_weight interaction with thin-film iridescence unclear

  AcademySoftwareFoundation/OpenPBR#319 · Filter by author jamportz opened on Sep 29, 2026
  3

• Clamp metallic Fresnel after specular_weight scaling via F0 and F82

  AcademySoftwareFoundation/OpenPBR#314 · Filter by author jamportz opened on Sep 7, 2026

• Clarify thin-walled mode: the flip/mirror model and sidedness

  AcademySoftwareFoundation/OpenPBR#312 · Filter by author jamportz opened on Jul 10, 2026

• specular_color tinting of internal reflections is inconsistent in the reference MaterialX graph (TIR untinted, partial internal reflection tinted)

  AcademySoftwareFoundation/OpenPBR#311 · Filter by author jamportz opened on Jul 10, 2026
  4

• Text about decoupled reflection highlight and refraction direction unclear

  AcademySoftwareFoundation/OpenPBR#310 · Filter by author RiverIntheSky opened on Jul 10, 2026
  1

• Unspecified default unit for length parameters such as subsurface_radius and transmission_depth

  AcademySoftwareFoundation/OpenPBR#308 · Filter by author sherholz opened on Jun 24, 2026

• Anisotropy: Bug in the derivation of the or wrong assumption about the resulting $a_t$ and $a_b$

  AcademySoftwareFoundation/OpenPBR#306 · Filter by author sherholz opened on Jun 5, 2026
  2

• Fix Changelog formatting.

  AcademySoftwareFoundation/OpenPBR#294 · Filter by author jamportz opened on Feb 17, 2026

• MaterialX OpenPBR Surface node definition natural logarithm (ln) function could be undefined

  AcademySoftwareFoundation/OpenPBR#291 · Filter by author nvpamand opened on Dec 24, 2025
  1

• Refactor layer structure to have gloss sit on top of the entire dielectric base

  AcademySoftwareFoundation/OpenPBR#282 · Filter by author jamportz opened on Dec 1, 2025
  1

• Use UI name "Scatter Anisotropy" in the Transmission section

  AcademySoftwareFoundation/OpenPBR#281 · Filter by author jamportz opened on Nov 6, 2025

• emission_luminance soft-max should be higher than its default

  AcademySoftwareFoundation/OpenPBR#280 · Filter by author jamportz opened on Oct 21, 2025

• Table of Contents section numbers

  AcademySoftwareFoundation/OpenPBR#279 · Filter by author emackey opened on Oct 20, 2025
  1

• State orthonormalization policy for input normals and tangents

  AcademySoftwareFoundation/OpenPBR#274 · Filter by author jamportz opened on Sep 9, 2025
  1

• TODOs following SIGGRAPH write-ups

  AcademySoftwareFoundation/OpenPBR#269 · Filter by author jamportz opened on Aug 13, 2025
  2

• transmission_dispersion_scale -> transmission_dispersion ?

  AcademySoftwareFoundation/OpenPBR#266 · Filter by author jamportz opened on Jul 21, 2025
  1

• Dual lobe phase function for SSS

  AcademySoftwareFoundation/OpenPBR#264 · Filter by author jamportz opened on Jul 6, 2025

• Capitalize all equation names

  AcademySoftwareFoundation/OpenPBR#263 · Filter by author peterkutz opened on Jun 26, 2025
  1

• Some more openPBR example mtlx file that support texture maps?

  AcademySoftwareFoundation/OpenPBR#259 · Filter by author RichardBaoRepo opened on Jun 9, 2025
  1

• Clarify the coat absorption behaviour for partial coverage

  AcademySoftwareFoundation/OpenPBR#252 · Filter by author virtualzavie opened on Mar 19, 2025
  3

• Update Markdeep version

  AcademySoftwareFoundation/OpenPBR#249 · Filter by author AdrienHerubel opened on Feb 5, 2025

• Add more implementation guidance for thin-film iridescence

  AcademySoftwareFoundation/OpenPBR#246 · Filter by author peterkutz opened on Jan 30, 2025

• Folding More Standards Into OpenPBR

  AcademySoftwareFoundation/OpenPBR#244 · Filter by author jackers2024 opened on Jan 12, 2025
  1