# Motion Vectors

Flora supports per-instance motion vectors for effects like TAA and motion blur.

## What This Affects

* Visual quality for moving instances.
* Memory usage (previous transform storage).
* Per-frame update cost for moving instances.

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### Enabling Motion Vectors

1. In [Runtime Settings](/scripts/runtime-settings.md), ensure `DisablePerObjectMotionVectors` is **off**.
2. In [Scene Settings](/scripts/scene-settings.md), enable `AllowPerObjectMotionVectors`.
3. For terrain-specific paths, enable tree/detail motion vector toggles as needed.

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### How It Works

If prefab renderers request per-object motion vectors, Flora stores previous transforms and emits motion-vector data for those instances.

> Tip: enable this only where needed to avoid unnecessary memory cost.

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### Terrain Trees and Details

`SceneSettings` can separately enable motion vectors for terrain trees/details. These still depend on `AllowPerObjectMotionVectors`.

## How To Verify

* Enable motion vectors and confirm moving Flora instances contribute to motion blur/TAA.
* Disable either project or scene gate and confirm contribution stops.


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