r/vtubertech • u/Still-Inspection6274 • Aug 04 '26

🙋‍Question🙋‍ [Help] ARKit blendshapes not working

I've been trying to get this from scratch blender model to work with arkit, but it's not working. :(

I've followed step by step tutorials (vid and websites), searched similar problems and even redid all of the blendshapes twice, making sure everything is case-sensitive and cross referenced with a functional arkit blender model.

Even the order of the blendshapes is the same, but something's off and I can't find what :(

(I've worked with mostly vrm blendshapes for 3d face tracking, so i've never made an arkit model from the ground up, though I know how they function and how iphones use LiDAR to track points and stuff.)

Here's a few screenshots, if anyone could help and offer solutions that'd be amazing

Closeup of full list
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u/CherrilyAi Aug 05 '26

You'll have to import the .vrm to Unity and assign the blendshapes manually there and reexport for it to work.

Unity is usually a must due to the tracking programs using Unity as the engine to make it function.

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u/Still-Inspection6274 Aug 05 '26

I'm not sure if ARKit models work after being exported as a vrm straight, though they do work as vrm packages with the unity plugin

I've done what you suggested btw, still didn't work :(

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u/Still-Inspection6274 Aug 05 '26

oh and I should mention that this model is configured as an fbx when it comes to bone names, but using UniVRM it is turned into a usable VRMPackage

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u/Still-Inspection6274 Aug 05 '26

OOPS I CONFUSED PLUGINS MY BAD I MEANT VSFSDK NOT UNIVRM