Human Template window
Euler curve resampling

Animation tab

Animation Clips are the smallest building blocks of animation in Unity. They represent an isolated piece of motion, such as RunLeft, Jump, or Crawl, and can be manipulated and combined in various ways to produce lively end results (see Animation State Machines, Animator Controller, or Blend Trees). You can select Animation Clips from imported FBX data.

When you click on the model containing animation clips, these properties appear:

The Animation Clip Inspector
The Animation Clip Inspector

There are four areas on the Rig tab of the Inspector window:

Asset-specific properties

Import options for the entire Asset
Import options for the entire Asset

These properties apply to all animation clips and constraints defined within this Asset:

プロパティー 説明
Import Constraints Import constraints from this asset.
Import Animation Import animation from this asset.

Note: If disabled, all other options on this page are hidden and no animation is imported.
Bake Animations Bake animations created using IK or Simulation to forward kinematic keyframes.

Only available for Maya, 3ds Max and Cinema 4D files.
Resample Curves Resample animation curves as Quaternion values and generate a new Quaternion keyframe for every frame in the animation.

This option is enabled by default.
Disable this to keep animation curves as they were originally authored this only if you’re having issues with the interpolation between keys in your original animation

Only appears if the import file contains Euler curves.
Anim. Compression The type of compression to use when importing the animation.
Off Disable animation compression. This means that Unity doesn’t reduce keyframe count on import, which leads to the highest precision animations, but slower performance and bigger file and runtime memory size. It is generally not advisable to use this option - if you need higher precision animation, you should enable keyframe reduction and lower allowed Animation Compression Error values instead.
Keyframe Reduction Reduce redundant keyframes on import. If selected, the Animation Compression Errors options are displayed. This affects both file size (runtime memory) and how curves are evaluated.
Keyframe Reduction and Compression Reduce keyframes on import and compress keyframes when storing animations in files. This affects only file size - the runtime memory size is the same as Keyframe Reduction. If selected, the Animation Compression Errors options are displayed.
Optimal Let Unity decide how to compress, either by keyframe reduction or by using dense format.

Only for Generic and Humanoid Animation Type rigs.
Animation Compression Errors Only available when Keyframe Reduction or Optimal compression is enabled.
Rotation Error How much to reduce rotation curves. The smaller the value, the higher the precision.
Position Error How much to reduce position curves. The smaller the value, the higher the precision.
Scale Error How much to reduce scale curves. The smaller the value, the higher the precision.
Animated Custom Properties Import any FBX properties that you designated as custom user properties.

Unity only supports a small subset of properties when importing FBX files (such as translation, rotation, scale and visibility). However, you can treat standard FBX properties like user properties by naming them in your importer script via the extraUserProperties member. During import, Unity then passes any named properties to the Asset postprocessor just like ‘real’ user properties.

Clip selection list

List of clips defined in this file
List of clips defined in this file

You can perform these tasks in this area of the Rig tab:

Clip-specific properties

Import options for the selected Animation clip
Import options for the selected Animation clip

This area of the Rig tab displays these features:

  • (A) The (editable) name of the selected clip
  • (B) The animation clip timeline
  • (C) Clip properties to control looping and pose
  • (D) Expandable sections for: defining curves, events, masks, and motion roots; and viewing messages from the import process

You can set these properties separately for each animation clip defined within this asset:

プロパティー 説明
Area A (editable name)
The name of the source take The take in the source file to use as a source for this animation clip.

This is what defines a set of animation as separated in Motionbuilder, Maya and other 3D packages. Unity can import these takes as individual clips. You can create them from the whole file or from a subset of frames.
Area B (timeline features)
The timeline editor You can use the drag the start and end indicators around the timeline to define frame ranges for each clip.
Start クリップの開始フレーム
End クリップの終了フレーム
Area C (looping and pose control)
Loop Time Play the animation clip through and restart when the end is reached.
Loop Pose Loop the motion seamlessly.
Cycle Offset Offset to the cycle of a looping animation, if it starts at a different time.
Root Transform Rotation
Bake into Pose Bake root rotation into the movement of the bones. Disable to store as root motion.
Based Upon Basis of root rotation.
Original Keep the original rotation from the source file.
Root Node Rotation Keeps the upper body pointing forward.

Only available for the Generic Animation Type.
Body Orientation Keep the upper body pointing forward.

Only available for the Humanoid Animation Type.
Offset ルートの回転のオフセット値(角度単位)
Root Transform Position (Y)
Bake into Pose Bake vertical root motion into the movement of the bones. Disable to store as root motion.
Based Upon (at Start) Basis of vertical root position.
Original Keep the vertical position from the source file.
Root Node Position Use the vertical root position.

Only available for the Generic Animation Type.
Center of Mass Keep center of mass aligned with the root transform position.

Only available for the Humanoid Animation Type.
Feet Keep feet aligned with the root transform position.

Only available for the Humanoid Animation Type.
Offset 垂直のルート位置のオフセット値。
Root Transform Position (XZ)
Bake into Pose Bake horizontal root motion into the movement of the bones. Disable to store as root motion.
Based Upon Basis of horizontal root position.
Original Keep the horizontal position from the source file.
Root Node Position Use the horizontal root transform position.

Only available for the Generic Animation Type.
Center of Mass Keep aligned with the root transform position.

Only available for the Humanoid Animation Type.
Offset 水平のルート位置のオフセット値
Mirror Mirror left and right in this clip.

Only appears if the Animation Type is set to Humanoid.
Additive Reference Pose Enable to set frame for the reference pose used as the base for the additive animation layer. A blue marker becomes visible in the timeline editor:
Pose Frame Enter a frame number to use as the reference pose. You can also drag the blue marker in the timeline to update this value.

Only available if Additive Reference Pose is enabled.
Area D (expandable sections)
Curves Expand this section to manage animation curves on imported clips.
Events Expand this section to manage animation events on imported clips.
Mask Expand this section to manage masking imported clips.
Motion Expand this section to manage selecting a root motion node.
Import Messages Expand this section to see detailed information about how your animation was imported, including an optional Retargeting Quality Report.

Creating clips is essentially defining the start and end points for segments of animation. In order for these clips to loop, they should be trimmed in such a way to match the first and last frame as best as possible for the desired loop.

Animation import warnings

If any problems occur during the animation import process, a warning appears at the top of the Animations Import inspector:

Animation import warning messages
Animation import warning messages

The warnings do not necessarily mean your animation has not imported or doesn’t work. It may just mean that the imported animation looks slightly different from the source animation.

To see more information, expand the Import Messages section:

Animation import warning messages
Animation import warning messages

In this case, Unity has provided a Generate Retargeting Quality Report option which you can enable to see more specific information on the retargeting problems.

Other warning details you may see include the following:

  • Default bone length found in this file is different from the one found in the source avatar.(このファイルに含まれるボーンの長さのデフォルトが、ソースアバターのものと一致しません。)
  • Inbetween bone default rotation found in this file is different from the one found in the source avatar.(このファイルに含まれるボーンとボーンの間の角度が、ソースアバターのものと異なります。)
  • Source avatar hierarchy doesn’t match one found in this model.(ソースアバターの階層が、このモデルに含まれるものと一致しません。)
  • This animation has Has translation animation that will be discarded.(このアニメーションに含まれる並進運動のアニメーションは破棄されます。)
  • Humanoid animation has inbetween transforms and rotation that will be discarded.(ヒューマノイドのアニメーションに含まれる変形の間と回転は破棄されます。)
  • Has scale animation that will be discarded.(破棄されたスケールアニメーションがあります)

These messages indicate that some data present in your original file was omitted when Unity imported and converted your animation to its own internal format. These warnings essentially tell you that the retargeted animation may not exactly match the source animation.

Note: Unity does not support pre- and post-extrapolate modes (also known as pre- and post-infinity modes) other than constant, and converts these to constant when imported.

Animation preview

Animation clip preview
Animation clip preview

The preview area of the Rig tab provides these features:

  • (A) The name of the selected clip
  • (B) The play/pause button
  • (C) The playback head on the preview timeline (allows scrubbing back and forth)
  • (D) The 2D preview mode button (switches between orthographic and perspective camera)
  • (E) The pivot and mass center display button (switches between displaying and hiding the gizmos)
  • (F) The animation preview speed slider (move left to slow down; right to speed up)
  • (G) The playback status indicator (displays the location of the playback in seconds, percentage, and frame number)
  • (H) The Avatar selector (change which GameObject will preview the action)
  • (I) The Tag bar, where you can define and apply Tags to your clip
  • (J) The AssetBundles bar, where you can define AssetBundles and Variants

Human Template window
Euler curve resampling