# Mass and Scalar Transformers

This group covers transformers that affect or display simple scalar part values.

## Included transformers

* `MassModifier`
* `PartScalarTransformer`
* `DefaultMassVisualizer`
* `DefaultScalarVisualizer`

## Use Cases

* use `MassModifier` when the variant should change OAB mass directly
* use `PartScalarTransformer` when the variant should emit a saved scalar override for generated part data
* use the `Default*Visualizer` helpers when you want the popout UI to show the part's baseline values for comparison

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**Documents**

- [DefaultScalarVisualizer](https://docs.ksp2redux.org/s/0a4a3e31-0b40-48e0-bd81-e14856f80d3d/doc/defaultscalarvisualizer-iku5vogc12)
- [DefaultMassVisualizer](https://docs.ksp2redux.org/s/0a4a3e31-0b40-48e0-bd81-e14856f80d3d/doc/defaultmassvisualizer-jaJgRWWUae)
- [PartScalarTransformer](https://docs.ksp2redux.org/s/0a4a3e31-0b40-48e0-bd81-e14856f80d3d/doc/partscalartransformer-cseuY4OjC1)
- [MassModifier](https://docs.ksp2redux.org/s/0a4a3e31-0b40-48e0-bd81-e14856f80d3d/doc/massmodifier-ayItWmdmkO)