Set Expression
The Set Expression instruction allows you to change the facial blendshape of a character.
For example, you can make your character look in pain when taking damage by triggering this instruction on an Attribute Change trigger, or make them look happy during dialogue.
Expressions are exported during cache generation from the runtime facial demo animation controller included in the FREE Starter Pack - Sidekick Modular Characters asset
Inside the Instruction
Sidekick Character
The character to apply the facial expression to. Supports both Game Creator 2 characters and non–Game Creator 2 characters.
Expression
Select which facial expression to apply. There are over 19 expressions available, including:
In Pain
Happy
Sad
Angry
Surprised
Neutral …and more
Transition
Defines how smoothly the expression changes. Enter a transition duration (in seconds).
If the Transition value is greater than 0, additional options appear:
Easing: Choose how the blendshape transitions (e.g., Linear, Ease In, Ease Out).
Time Mode: Select whether to use Game Time or Unscaled Time for the transition.
Wait to Complete: When enabled, the instruction waits until the transition finishes before continuing to the next instruction in your sequence.
Example Use Case
You can make your character look in pain when taking damage using an On Attribute Change trigger.
For example:
Create a Trigger with On Attribute Change (HP) as the event.
Inside the trigger, add the Set Expression instruction.
Assign your Sidekick Character and choose the “In Pain” expression.
(Optional) Add a short Transition time (like 1.2s) for a smoother, natural reaction.
Now, whenever the character loses HP, their facial expression will change to show pain.
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