Tracking Standard Comparison Overview
This page goes over specific translations for each standard into Unified Expressions. For more concrete examples of each standard listed, please refer to the appropriate standards' documentation.
Base and Blended shapes from Unified Expressions will be matched directly with other standards' shapes. Some caveats such as unique shapes will be given more detailed explanations on how they can translate to Unified Expressions.
This table provides a comprehensive understanding of the relationship between various shapes and Unified Expressions:
When multiple shapes are listed in the same row, they collaboratively contribute to the formation of a specific standard shape.
~ indicates that the expression in a row is directly connected
elsewhere.
❌ indicates that the expression in a row is not tracked.
Some shapes have an extra condition (While X, Negates X)
that indicates that specified cell needs the presence or absence
of specific shapes to convey a specific expression accurately in
order to correlate it to the other expressions in that row.
This often necessitates particular adjustments (animation
or blendshape) for compatibility with Unified Expressions,
while maintaining anatomical consistency within the given row.
Whilesignifies that a standard requires a shape to be active to match the row.Negatessignifies that a standard requires a shape to be inactive to match the row.
Regardless of the conditions, the shape can be converted into Unified Expressions without compromising tracking quality or expression behavior.
This section only provides a generalized comparison across all standards; for more specific information refer to the dedicated sections for each standard.
Standard Comparisons
| Unified | ARKit | SRanipal | Meta Movement (Quest Pro) |
|---|---|---|---|
| EyeLookUpRight | eyeLookUpRight | Eye_Right_Look_Up | EYES_LOOK_UP_R |
| EyeLookDownRight | eyeLookDownRight | Eye_Right_Look_Down | EYES_LOOK_DOWN_R |
| EyeLookInRight | eyeLookInRight | Eye_Right_Left | EYES_LOOK_IN_R |
| EyeLookOutRight | eyeLookOutRight | Eye_Right_Right | EYES_LOOK_OUT_R |
| EyeLookUpLeft | eyeLookUpLeft | Eye_Left_Look_Up | EYES_LOOK_UP_L |
| EyeLookDownLeft | eyeLookDownLeft | Eye_Left_Look_Down | EYES_LOOK_DOWN_L |
| EyeLookInLeft | eyeLookInLeft | Eye_Left_Right | EYES_LOOK_IN_L |
| EyeLookOutLeft | eyeLookOutLeft | Eye_Left_Left | EYES_LOOK_OUT_L |
| EyeClosedRight | eyeBlinkRight | Eye_Left_Blink | EYES_CLOSED_R |
| EyeClosedLeft | eyeBlinkLeft | Eye_Left_Blink | EYES_CLOSED_L |
| EyeSquintRight | eyeSquintRight | ~ | EYES_SQUINT_R |
| EyeSquintLeft | eyeSquintLeft | ~ | EYES_SQUINT_R |
| BrowDownRight CheekSquintRight EyeSquintRight While EyeClosedRight | ~ | Eye_Right_squeeze¹ | ~ |
| BrowDownLeft CheekSquintLeft EyeSquintLeft While EyeClosedLeft | ~ | Eye_Left_squeeze¹ | ~ |
| EyeWideRight | eyeWideRight | Eye_Right_Wide | EYES_WIDEN_R |
| EyeWideLeft | eyeWideLeft | Eye_Left_Wide | EYES_WIDEN_L |
| EyeDilationRight | ❌ | Eye_Right_Dilation | ❌ |
| EyeDilationLeft | ❌ | Eye_Left_Dilation | ❌ |
| EyeConstrictRight | ❌ | Eye_Right_Constrict | ❌ |
| EyeConstrictLeft | ❌ | Eye_Left_Constrict | ❌ |
| BrowDownRight | browDownRight | ❌ | BROW_LOWERER_R |
| BrowDownLeft | browDownLeft | ❌ | BROW_LOWERER_L |
| BrowInnerUpRight | ~ | ❌ | INNER_BROW_RAISER_R |
| BrowInnerUpLeft | ~ | ❌ | INNER_BROW_RAISER_L |
| BrowInnerUp | browInnerUp | ❌ | ~ |
| BrowOuterUpRight | browOuterUpRight | ❌ | OUTER_BROW_RAISER_R |
| BrowOuterUpLeft | browOuterUpLeft | ❌ | OUTER_BROW_RAISER_L |
| NoseSneerRight | noseSneerRight | ❌ | NOSE_WRINKLER_R |
| NoseSneerLeft | noseSneerLeft | ❌ | NOSE_WRINKLER_L |
| CheekSquintRight | cheekSquintRight | ~ | CHEEK_RAISER_R |
| CheekSquintLeft | cheekSquintLeft | ~ | CHEEK_RAISER_L |
| CheekPuffRight | ~ | Cheek_Puff_Right | CHEEK_PUFF_R |
| CheekPuffLeft | ~ | Cheek_Puff_Left | CHEEK_PUFF_L |
| CheekPuff | cheekPuff | ~ | ~ |
| CheekSuckRight | ❌ | ~ | CHEEK_SUCK_R |
| CheekSuckLeft | ❌ | ~ | CHEEK_SUCK_L |
| CheekSuck | ❌ | Cheek_Suck | ~ |
| JawOpen | jawOpen | Jaw_Open | JAW_DROP |
| MouthClosed | mouthClose | Mouth_Ape_Shape¹Negates Jaw_Open | LIPS_TOWARD |
| JawRight | jawRight | Jaw_Right | JAW_SIDEWAYS_RIGHT |
| JawLeft | jawLeft | Jaw_Left | JAW_SIDEWAYS_LEFT |
| JawForward | jawForward | Jaw_Forward | JAW_THRUST |
| LipSuckUpperRight | ~ | ~ | LIP_SUCK_RT |
| LipSuckUpperLeft | ~ | ~ | LIP_SUCK_LT |
| LipSuckUpper | mouthRollUpper | Mouth_Upper_Inside | ~ |
| LipSuckLowerRight | ~ | ~ | LIP_SUCK_RB |
| LipSuckLowerLeft | ~ | ~ | LIP_SUCK_LB |
| LipSuckLower | mouthRollLower | Mouth_Lower_Inside | ~ |
| LipFunnelUpperRight | ~ | ~ | LIP_FUNNELER_RT |
| LipFunnelUpperLeft | ~ | ~ | LIP_FUNNELER_LT |
| LipFunnelUpper | ~ | Mouth_Upper_Overturn¹ | ~ |
| LipFunnelLowerRight | ~ | ~ | LIP_SUCK_RB |
| LipFunnelLowerLeft | ~ | ~ | LIP_SUCK_LB |
| LipFunnelLower | ~ | Mouth_Lower_Overturn¹ | ~ |
| LipFunnel | mouthFunnel | ~ | ~ |
| LipPuckerUpperRight LipPuckerLowerRight | ~ | ~ | LIP_PUCKER_R |
| LipPuckerUpperLeft LipPuckerLowerLeft | ~ | ~ | LIP_PUCKER_L |
| LipPucker | mouthPucker | Mouth_Pout | |
| MouthUpperUpRight | mouthUpperUpRight | Mouth_Upper_Up_Right | UPPER_LIP_RAISER_R |
| MouthUpperUpLeft | mouthUpperUpLeft | Mouth_Upper_Up_Left | UPPER_LIP_RAISER_L |
| MouthLowerDownRight | mouthLowerUpRight | Mouth_Lower_Down_Right | LOWER_LIP_DEPRESSOR_R |
| MouthLowerDownLeft | mouthLowerUpLeft | Mouth_Lower_Down_Left | LOWER_LIP_DEPRESSER_L |
| MouthSmileRight | mouthSmileRight | Mouth_Smile_Right | LIP_CORNER_PULLER_R |
| MouthSmileLeft | mouthSmileLeft | Mouth_Smile_Left | LIP_CORNER_PULLER_L |
| MouthFrownRight | mouthFrownRight | ~ | LIP_CORNER_DEPRESSOR_R |
| MouthFrownLeft | mouthFrownLeft | ~ | LIP_CORNER_DEPRESSOR_L |
| MouthSadRight | ~ | Mouth_Sad_Right | ~ |
| MouthSadLeft | ~ | Mouth_Sad_Left | ~ |
| MouthStretchRight | mouthStretchRight | ~ | LIP_STRETCHER_R |
| MouthStretchLeft | mouthStretchLeft | ~ | LIP_STRETCHER_L |
| MouthDimplerRight | mouthDimpleRight | ~ | DIMPLER_R |
| MouthDimplerLeft | mouthDimpleLeft | ~ | DIMPLER_L |
| MouthRaiserUpper | mouthShrugUpper | ❌ | CHIN_RAISER_T |
| MouthRaiserLower | mouthShrugLower | Mouth_Lower_Overlay | CHIN_RAISER_B |
| MouthPressRight | mouthPressRight¹ | ❌ | LIP_PRESSOR_R |
| MouthPressLeft | mouthPressLeft¹ | ❌ | LIP_PRESSOR_L |
| MouthTightenerRight | ❌ | ❌ | LIP_TIGHTENER_R |
| MouthTightenerLeft | ❌ | ❌ | LIP_TIGHTENER_L |
| TongueOut | tongueOut | Tongue_LongStep1 Tongue_LongStep2 | TONGUE_OUT |
| TongueUp | ❌ | Tongue_Up | ❌ |
| TongueDown | ❌ | Tongue_Down | ❌ |
| TongueRight | ❌ | Tongue_Right | ❌ |
| TongueLeft | ❌ | Tongue_Left | ❌ |
| TongueRoll | ❌ | Tongue_Roll | ❌ |
- ¹ Requires the use of a specialized animation setup to work with VRCFT V2 tracking.
- Bold Blended Shape.
Standard Documentation
| Standard | Link |
|---|---|
| Unified Expressions | VRCFT Documentation |
| ARKit | Apple Developer Documentation ARKit Shape References (Unofficial) |
| VIVE SRanipal | VIVE Developer Resource VRCFT v4.0 Documentation |
| Meta Movement | Blendshape Visual Reference for Movement |