Surfgrad From Deriv
Takes a texture space height derivative and returns a Surface Gradient.

Ports
| Name | Direction | Type | Binding | Description |
|---|---|---|---|---|
| Deriv | Input | Vector 2 | None | Texture space height derivatives |
| Tangent | Input | Vector 3 | None | Basis tangent |
| Bitangent | Input | Vector 3 | None | Basis bitangent |
| Surfgrad | Output | Vector 3 | None | Output surface gradient |