Jimmy Gunawan

Actually "stepped keys" is still not exactly stepped in USDZ. But as GLTF, it is really stepped. Maybe keying visibility is still not possible. I want to have 3D animation...

Kind of related, but I tested a couple of BVH mocap armature into Blender and then trying to export and getting all kind of weird USDZ animation... The issue seems...

As GLTF this works: [ManyAnim.zip](https://github.com/kcoley/gltf2usd/files/3451495/ManyAnim.zip) But when converted to USDZ, it failed...

It's just 2 box object animated for 10 frames. I provide the blend, usda, gltf, fbx --- none of them works... only 1 object animating >< [boxanim.zip](https://github.com/kcoley/gltf2usd/files/3451718/boxanim.zip)

This one actually works... parented all objects into an empty called ROOT. It's weird. I think I've done something similar in the past (?) with eyeballs animation. [this_work_parented_ROOT.zip](https://github.com/kcoley/gltf2usd/files/3451811/this_work_parented_ROOT.zip)

I tried with my Torus, with root parent... still does not work. It does not make sense... [Archive.zip](https://github.com/kcoley/gltf2usd/files/3451956/Archive.zip)

My feeling is that somewhat "only 1 animation" possible under 1 action take. Sometimes with the right "hack" multiple objects can work. I tested with Sketchfab and very often only...

My quick solution so far is to bring all those animated objects into SKETCHFAB, and then redownloading the gltf... https://sketchfab.com/3d-models/hundred-torus-procedural-animation-fd8c3e9676944d9c8faf973d47898f39 It's weird but works. Someone at Apple, working on usdzconvert...

Twitter Thread: https://twitter.com/jimmygunawanapp/status/1156732937565429767?s=20 I am still wondering what Sketchfab did when converting BLEND into GLTF that works with the converter...! BIG MYSTERY.

From Ash, one solution is to export as DAE, import back into Blender, export as GLTF. Then it works. Strange?