Unity 3D: parameterizable animations

March 27 2026

Unity3D

Animations are very important in a game and Unity Technologies understands this well. Since the fifth version of the software, the animation system has been significantly improved with new features.

  • The StateMachineBehaviours component makes its appearance, based on the same principle as MonoBehaviours but applied to state machines.
  • Redesign of the Blend Tree to control the weight of each animation independently.
  • The addition of two transition nodes (Entry, Exit) that define how the state machine should behave when entering or exiting a state.
  • Components such as Controllers, StateMachines, BlendTree, etc. can be created and edited directly via script.

Unity offers a powerful parameterizable animation system that allows you to create interactive and dynamic animations in your games. With this system, you can define parameters that control the behavior of animations, enabling smooth and responsive transitions.

Parameterizable animations in Unity allow you to control the movements and transitions of an object or character based on specific parameters such as speed, direction, health state, and more. These parameters can be modified at runtime via scripts, enabling adaptive and responsive animations.

To start using parameterizable animations in Unity, follow these steps:

  • Prepare the animations: Create your animations in an external animation software, such as Blender or Maya, or use Unity’s built-in animation tools to create simple animations directly in the editor.
  • Create the parameters: Determine which parameters you want to use to control your animations. For example, you might use a “Speed” parameter to control the walking speed of a character.
  • Create animation states: In Unity’s animation editor, create animation states corresponding to the different animations you want to play.
  • Configure transitions: Determine the conditions under which transitions from one animation to another should occur. Use the previously defined parameters to set these conditions.
  • Control animations at runtime: Use C# scripts to modify parameter values at runtime. For example, adjust the “Speed” parameter based on the player’s input to smoothly transition between walking and running animations.

Parameterizable animations in Unity offer increased flexibility and interactivity, allowing you to create dynamic and responsive animations that enhance the player’s experience.

Don’t hesitate to explore Unity’s documentation on parameterizable animations to learn more about the available features and further customize the animations in your games.

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