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vorg avatar vorg commented on May 28, 2024

There is quite difference between pex and BabylonJS or ThreeJS https://github.com/vorg/pbr-compare
screenshot

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vorg avatar vorg commented on May 28, 2024

Existing implementations

Cesium
https://github.com/AnalyticalGraphicsInc/cesium/blob/d64ae0ac77a9ec3fb4fa27d2dfc9a7c7a86310f3/Source/ThirdParty/GltfPipeline/processPbrMetallicRoughness.js

glTF WebGL
http://github.khronos.org/glTF-WebGL-PBR/

glTF
https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#appendix-b-brdf-implementation

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vorg avatar vorg commented on May 28, 2024

Filament
https://github.com/google/filament

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vorg avatar vorg commented on May 28, 2024

Reopening since we moved to Filament implementation

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vorg avatar vorg commented on May 28, 2024

Status update: I've printed all the code on 5 pages of A3 and will do manual review at home

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vorg avatar vorg commented on May 28, 2024
  • update pbr-compare to the newest pex-renderer
  • rotate cubemaps in all engines if possible to the same orientation
  • write down differences and possible causes

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