# Facial Expressions Requirements ## **Look At Requirements** * You may follow the [VRM Look At Spec](https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/lookAt.md) and set up look at in Unity, or in Blender. * Look At MUST USE “Expression” mode, Hallway does not yet support Look At Bones. ## **Facial Shapes Requirements** You may follow the [VRM Expressions Spec](https://github.com/vrm-c/vrm-specification/tree/master/specification/VRMC_node_constraint-1.0) and set up VRM expressions in Unity, or in Blender. **Notes for Blender:** Hallway Requires all VRM Preset Expressions + ARKit * If you’re using a **Ready Player Me Avatar** you can append the following PHP to the download URL to get a model in T-Pose and all the ARKit shapes required:\ ?morphTargets=mouthSmile,ARKit\&pose=T\&textureAtlas=none\&textureChannels=baseColor,normal,metallicRoughness
EXAMPLE SPEECH SHAPES:EXPORTING AS VRM:

“aa”

“ih”

“ou”

“eh”

“oh”

(full features) VRM Visemes (aa, ih, eh, oh, ou), blinks, winks, look up/down/left/right (as expressions, NOT bones) (Optional) Add ARKit 52 Shapes (map these to VRM custom expressions w/same naming) Some emotes (like wink) leverage ARKit to be more expressive than base VRM shapes allow
### You can also leverage UV offsets in VRM Expressions! | | Previewing UV Transform in Blender: In the VRM N-Panel “Expressions” section, select the bool “Show Preview Feature” ![](/files/2873f498f4fc1320aa26e555b6d7421a205c0917) After adding a material to the UL list, hit “Refresh Preview” to enable real-time updates as you adjust the “offset” and “scale” parameters (below) ![](/files/4ffe80aa29df98f4f3a7e0e0ea70995a8157222e) You need to hit “Refresh Preview” any time you add a new material to this list or you add texture transform to another expression. (This is because the VRM addon previews this feature through material drivers) | | ------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ### Important Notes and Nuances of VRM Expressions * Our emotion expressions might play over speech, so best practice is to not open the mouth too much or close the eyes too much in these emotes to avoid nightmare fuel during speech. * Specifically, "Happy" “Sad” “Surprised” “Angry” “Neutral” and "Relaxed" need to respect these rules. Test how each of these emotes blends with "aa" "ih" "ou" "ee" "oh" and eye blinks. As long as they work with those, you're good to go! 👍
❌✅

❌

+ Speech =

+ Blinks =

✅

Happy

Angry

Sad

Relaxed

Surprised

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