support for "KHR_materials_clearcoat", "KHR_materials_transmission", "KHR_materials_sheen"

[rawwerks]

i love this resource. it would fantastic if it were updated to support the 3 new PBR extensions (https://gfxspeak.com/2020/12/03/physically-rendering-extensions/)

Left is is https://gltf-viewer.donmccurdy.com/ , right is https://sandbox.babylonjs.com/.

Thank you!

[donmccurdy]

Hi! I believe KHR_materials_clearcoat is already supported (let me know if you have trouble with it!), but you're correct that the others are not yet. This viewer depends on three.js for rendering, and so three.js would need to add support for these extensions first. If you'd be interested in leaving an upvote or comment there, I believe that mrdoob/three.js#16977 is the relevant issue.

[cx20]

BTW, I think three.js r131 supports KHR_materials_transmission.

[donmccurdy]

Just updated to r131 – should include transmission, volume, and IOR if I'm not mistaken. Sheen is still not really supported, but I'll close out this issue for now since there hasn't been movement on that in three.js for a while.

[cx20]

Thank you for updating to the latest version.
However, when I tried it, it seems that there is an error in the console.
https://gltf-viewer.donmccurdy.com/

app.js:1 
Uncaught SyntaxError: Cannot use import statement outside a module

Is it a problem with my environment?
Environment: Windows 10 + Chrome 92

[donmccurdy]

Ah, thanks! Should be fixed now.

[cx20]

Thank you for the quick fix. I think it's okay now.
glTF Viewer + Duck.gltf(use Transmission extension) result: