# Create Site Shading

An Extruded Form could be an individual shading device, an internal shading element (e.g. furniture) or an adjacent building. 

## Add Extruded Form

To add an Extruded Form, navigate to the Shading (under Building), then locate the 'Add Horizontal Shading' icon. Next, draw the proposed surface of the Extruded Form.  Now, select the surface, and then select 'Options' in the left tab. Set the 'Extrusion' height. You can also set the 'Base Height', the height at which shading starts from ground level and the 'Opacity', where 0% is completely transparent. Click 'Save and Close' and then navigate to the [3D View](/user-guide/2d-building/drawing/3d-view.md) to see the new shading. 

<figure><img src="/files/aeoIECuXSYkvnZRl5fGs" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/sdSJc4e9JzhoPSspU1TQ" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/XtNGLSKkRTKUMv5WemMn" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/4RNqnQKIL9B3VKJruqcD" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/k8BrQ9D49eGIb0uO8hi3" alt=""><figcaption></figcaption></figure>

## Customise a Shading Surface

To add a 'Shading Surface', first find a previously drawn 'Horizontal Shading' element. Select it, then go to the 'Surface' tab. From there, you can set the surface using the same tool as a roof design.

<figure><img src="/files/WgnLKn0VGLwg6j38WFbe" alt=""><figcaption></figcaption></figure>


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