> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spline.design/llms.txt
> Use this file to discover all available pages before exploring further.
# Extruding 2D objects in 3D
Although 2D objects don't have a depth parameter, they can quickly become 3D using a modeling operation called **Extrusion**.
## How to extrude a 2D object
1. Select the object you want to extrude.
2. Go to the **Shape** panel on the right sidebar and add value to the **Extrusion** property by typing or sliding to the desired amount.
## Tips when working with extrusions
* Change the lighting type to **Lambert Phong Physical,** or **Toon** if you want it to to achieve different styles.
* The position of the lightning layer matters, Hide or unhide the layer to receive light/shadows.
* Ensure that you select **Front** on the Visibility Panel; this will improve surface shading on the object when enabling shadows.