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Refinement Interface - Properties Panel

Learn how to control lip sync with the Properties Panel

Table of Contents

Properties Panel Controls
    Performance Controls
 Lip Sync Controls
Lip Sync Controls
     Working with Visemes
     Adding a Viseme
     Adjusting a Viseme
     Moving a Viseme in Time
Advanced Controls (Optional)
     How to Apply Advanced Blendshape Controls
     Working with Keyframes
           Keyframe Buttons
           Adjusting a slider
           Entering a numeric value
           Keyframe Shortcuts / Hotkeys

 


Properties Panel Controls

The properties panel is where you can access the Performance and Lip sync controls. They are:

Performance Controls

Interpolation - allows you to define how much of the new performance (the Driving Data) is transferred to the shot.

Driving Data Scale - allows you to control performance size, effectively acts as a ‘multiplier’ of the articulation from the driving data.

Lip Sync Controls

Visemes - these are intuitive, speech-based mouth shapes commonly used in spoken dialogue.

Advanced (blendshape) controls - these are individual blendshape controls that can be used to finetune mouth shapes if visemes adjustments are insufficient.

All these adjustments are made by the addition of keyframes.


 

Lip Sync Controls

The lip sync controls allow you to adjust the mouth movements of an actor to achieve perfect lip sync. You can do this using Visemes and Advanced Controls (blendshapes).


 

Working with Visemes

Adding a Viseme

Before you add a viseme, check out our page on how to assess a vub. If you have identified frames where you want to alter the mouth shape, proceed with the following steps. 

  1. Move the playhead to the frame you want to adjust.
  2. In the panel on the right, select the viseme that matches the dialogue on that frame.
  3. Click the viseme button to add it to the timeline.

The viseme appears on the timeline (at the value of 0%) where the playhead is positioned. 

To help maintain smooth motion, neutral anchor keyframes (at the value of 0%) are automatically added three frames either side of the viseme.

Under the hood, the correct combination of facial movements for that viseme are activated (but not yet adjusted). 

Removing a Viseme

To remove a viseme:

  1. Select the viseme keyframe (and its neutral anchors).
  2. Press Backspace / Delete.

This removes the viseme and all associated adjustments from the timeline.

Adjusting a Viseme

Each viseme has a strength value, allowing you to fine-tune how pronounced the mouth shape appears.

  • Visemes are added at 0% strength by default 
  • Strength can be adjusted from -300% to +300%

To adjust strength:

  1. Hover over a viseme keyframe to view its current value.
  2. Select the keyframe or move the playhead to the viseme and click the viseme button
  3. Use the Up / Down arrow keys to increase or decrease strength.

The on-screen face preview updates in real time as you adjust.

Negative values can be useful for softening or inverting a mouth shape, while higher values exaggerate articulation.

Moving a Viseme in Time

By default, a viseme is placed at the current playhead position. You can reposition it at any time:

  1. Select the viseme keyframe (and anchors if needed).
  2. Use:
    • Left / Right arrows to move frame-by-frame
    • Shift + Left / Right to move in larger steps

 

Advanced Controls (Optional)

For cases where additional adjustment is required, you can access Advanced Controls by clicking the Advanced tab in the Lip Sync controls panel.

This reveals individual facial controls such as mouth, jaw, and nose adjustments.


Viseme-driven adjustments remain active, even though their underlying values are not displayed on the timeline. Any advanced adjustments you add act as overrides, layered on top of the viseme.

This allows for precise tweaks without losing the simplicity of the viseme workflow.

How to Apply Advanced Lip Sync Controls
  1. Move the playhead to the frame you’d like to adjust.
  2. Add a keyframe to the blendshape you need to edit
  3. Add a keyframe before and after that frame to define the start and end points of the adjustment. Set these keyframes sufficiently far apart to avoid sharp, sudden movements caused by your adjustment.


 

Working with Keyframes

Keyframes are applied to the timeline to adjust lip sync.
Keyframe additions / adjustments are applied where your playhead is resting in the timeline.

Screenshot 2025-11-17 at 3.29.32 PM

To add or adjust keyframes in your timeline and therefore make adjustments to your lip sync, you can use one of three methods – clicking a keyframe icon, adjusting a slider or directly entering a numeric value. 

Keyframe Buttons

When your playhead hovers over a keyframe in the timeline, these diamond icons become filled. They not only show the location of a keyframe but can also be used to create one.

Click the icon to generate a keyframe with a value of 0.

Adjusting a slider

Click and drag a slider to add or adjust keyframes.
Double-click on the slider marker to reset the value to 0.

RefinementSliderControl-1

Entering a numeric value

Type in a numeric value, positive or negative, to add or adjust a keyframe.

RefinementNumericControl

Keyframe Shortcuts / Hotkeys

Click + drag = create a ‘lasso’ in the timeline to select multiple keyframes simultaneously. 

Select a keyframe and:

  • Delete/backspace = remove keyframe(s).
  • Right arrow/left arrow = move keyframe(s) left or right by one frame.
  • Right arrow/left arrow + shift = move keyframe(s) to left or right by 10 frames. 
  • Up arrow/down arrow = increase/decrease keyframe(s) value by one. 

Up arrow/down arrow + shift = increase/decrease keyframe(s) value by 10. 

You can adjust multiple blendshapes on the same frame, but apply sparingly and only when necessary: too many overrides can cause an inorganic result.

To render your adjustments, click Render Changes.

Note: Applying a negative value to a blendshape control will make an adjustment that is the opposite of that blendshape’s description. For example:

  • Setting Jaw - Open to -10 will close the jaw.

Setting the Mouth - Funnel to -10 will make the lips flatter and less round.


Read next: Refinement Interface - Timeline