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# Pure Root Motion Format
## Pure Root Motion
When uploading a JSON file to create a Trail in the Trail Set Manager, the JSON must be written in the compatible format.
### Format Definition
Pure Root Motion uses a flat array where **each 7 elements represents 1 frame**. It may look like this:
In this order, each element within a set of 7 represents:
1. X Position
2. Y Position
3. Z Position
4. Quaternion W
5. Quaternion X
6. Quaternion Y
7. Quaternion Z
```
[Px1, Py1, Pz1, Qw1, Qx1, Qy1, Qz1, Px2, Py2, Pz2, Qw2, Qx2, Qy2, Qz2, ... ]
```
Example
```json
[0.0,0.0,0.0,1.0,0.0,0.0,0.0,1.0,0.0,2.0,1.0,0.0,0.0,0.0, ...]
```
{% hint style="info" %}
Motion Factory uses a right-handed Y-Up Axis:
* X is left
* Y is up
* Z is forward.
{% endhint %}
### Frame Rate
Root motion is locked to 30 fps, and any uploaded root motion paths will cause artefacts.
#### Recording at Runtime
If recording at runtime, we recommend plotting recorded values to a curve and then resampling at a constant 30 fps due to the uncertainty of frame intervals**.** You can then record at a higher frame rate and downsample the root motion to the JSON file before uploading.
#### Simulating paths
If simulating paths, you must simulate with an exact delta for 30 fps (0.33333 seconds).
---
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