Gltf-blender-io: Broken morph target animation

[donmccurdy]

From @mrdoob in #52 —

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Seems like the materials no longer export with the latest version of the exporter 😕

alligator.blend.zip

alligator_old.gltf.zip

alligator_new.gltf.zip

[donmccurdy]

Materials are working in the new exporter and Blender 2.8 (after changing everything to Principled BSDF) but animation is failing.

[donmccurdy]

Export with Always Sample Animation" does work, but shouldn't be necessary.

Aside: the model will appear to have inverted normals after export, but I don't think that's an exporter bug.

[mrdoob]

Aside: the model will appear to have inverted normals after export, but I don't think that's an exporter bug.

Yeah, it's a bug in the model/animation.

[donmccurdy]

Improved with https://github.com/KhronosGroup/glTF-Blender-IO/pull/412, but still broken.

[julienduroure]

@donmccurdy Didn't test with old version, but animation export looks to be OK now with last version.

[donmccurdy]

Looks good now, yes!

[mrdoob]

Will the fixed version land with 2.8?

[emackey]

@mrdoob Yes, generally any fix that lands in master here gets copied (by Julien) to the Blender Addons repository, and is available within about 3 days from the 2.80 nightly builds. Currently, June 20's nightly build is all caught up with everything in master here this morning.