# fsMapViewSetMapHillShadeVerticalExaggeration<no value>
This function can be used to set the amount of vertical exaggeration for hill shading on 2D maps. This does not apply to aerial maps ([`FS_MAP_VIEW_MODE_AERIAL`](../fsmapviewsetviewmode/#remarks)). Vertical exaggeration (VE) is the amplification of terrain slopes (relief) in order to increase contrast. Exaggeration is specified as a power law of the form `VE = fExaggeration * x^fExaggerationExponent`, where `x` is the number of meters per rendered pixel. This allows for increasing VE at higher map ranges where less terrain resolution is provided. The exaggeration exponent can be used to make the increase sublinear or superlinear. If a constant exaggeration is desired, set the exponent to 0.


##### Syntax

``` wasm
bool fsMapViewSetMapHillShadeVerticalExaggeration(
    FsContext ctx,
    FsTextureId id,
    float fExaggeration,
    float fExaggerationExponent
);
```


##### Members

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| Parameters | Description |
| --- | --- |
| `ctx` | A value of type `FsContext` provided as an argument of the gauge callback. |
| `id` | The MapView render ID as returned by the function [`fsMapViewCreate`](../fsmapviewcreate/). |
| `fExaggeration` | The base vertical exaggeration factor. Must be greater than or equal to 0. Defaults to 1 on map creation. |
| `fExaggerationExponent` | The vertical exaggeration exponent. Defaults to 0 (constant exaggeration) on map creation. |

{{< /table-wrapper >}}


##### Return Values

Returns `false` if:

-   no texture matches the given MapView ID
-   the `ctx` is invalid

Otherwise it will return `true`.


##### Remarks

N/A