# Sandbox.ModelDeformer.NormalModeType

How a volume changes the shading frame, independently of its vertex displacement.

- Kind: enum
- Assembly: `Sandbox.Engine`
- Modifiers: sealed

## Fields

- [`Accurate`](/api/Sandbox.ModelDeformer.NormalModeType/Accurate): Keep surface lighting aligned with the deformed mesh. Recommended for most models.
- [`Preserve`](/api/Sandbox.ModelDeformer.NormalModeType/Preserve): Keep the incoming surface lighting while this operation changes the shape.
- [`Smooth`](/api/Sandbox.ModelDeformer.NormalModeType/Smooth): Soften abrupt changes in surface lighting. Adjust Smoothing to choose how much detail to soften.