Iridescence support in Blender Viewport

馃尩 Needle Engine
1

Using this model here (glTF-Sample-Models/2.0/IridescenceLamp at main 路 KhronosGroup/glTF-Sample-Models 路 GitHub), with DropListener in a build of Needle the IOR pulls in fine, if I bring it into Blender, Blender loses the IOR and displays the model a lot differently, see screenshots below but is this something the Needle Blender Plugin can help with? Screenshot attached is the original model from above as .glb loaded with DropListener

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Original Post on Discord

by user 103054507105067008

2

Loaded into Blender

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by user 103054507105067008

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Re-exported from Blender as-is as .glb and loaded into DropListener in Needle

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by user 103054507105067008

4

If the material is already wrong in blender it will not look correct in runtime

5

Blender doesn鈥檛 seem to be able to export KHR_materials_iridescence

by user 103054507105067008

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Maybe you can ask/open an issue for the IO here: Issues 路 KhronosGroup/glTF-Blender-IO 路 GitHub

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Already seen that Iridescence is being worked on here https://developer.blender.org/T99447

by user 103054507105067008

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Just trying to figure out what鈥檚 up with Volume not exporting

by user 103054507105067008

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Raised the issue here to track, makes Blender unusable for editing those kinds of models using Volume and iridescence Volume and Iridescence GLTF/GLB from glTF-Sample-Models do not display or import/export correctly 路 Issue #1838 路 KhronosGroup/glTF-Blender-IO 路 GitHub

by user 103054507105067008

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Some workarounds needed but I have a fix within Blender Volume and Iridescence GLTF/GLB from glTF-Sample-Models do not display or import/export correctly 路 Issue #1838 路 KhronosGroup/glTF-Blender-IO 路 GitHub

by user 103054507105067008

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Yeah, I believe there鈥檚 a number of extensions where Blender-IO is not there yet and I pushed ahead for support in UnityGltf

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There鈥檚 a big refactor upcoming in Blender that aligns the material model closer to glTF (part of T99447 that you referenced above)

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Worth noting that almost everyone edits those kinds of models by hand, I found that kind of hilarious so added support in UnityGltf.

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Changed the channel name: Irdidescence support in Blender

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I am making note to use VS-Code GLTF tools to modify materials that I simply can鈥檛 preview in Blender on that basis :sweat_smile: really hoping for Blender to get up to spec soon, I鈥檓 moving the 3D team across to using Blender mainly for PBR/GLTF so it鈥檚 a shame they are so behind in some areas. Is a pain they can鈥檛 preview some of the material properties in the Blender viewport

by user 103054507105067008

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Changed the channel name: Iridescence support in Blender Viewport

by user 103054507105067008

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Actually Blender is one of the most advanced glTF softwares - just so happens that we鈥檝e been spearheading in a few areas with UnityGltf, so that is (in my opinion) just more advanced and Blender is pretty good as well :smile:

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Credit where it is due, UnityGLTF is fantastic :heart_eyes:

by user 103054507105067008

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@herbst馃尩 I have an example GLTF file using Reflective/thickness/specular reflection values that doesn鈥檛 display correct in Unity with UnityGLTF, then doesn鈥檛 export correctly with Needle using UnityGLTF but renders fine using DropListener in Needle. I will DM you it

by user 103054507105067008

20

That sounds like a UnityGLTF roundtrip issue then. Thanks