Original image, the colored rectangle is selected

Filter applied

This filter adds a slight bevel to an image using a bump map (see below). If there is a selection, it is bevelled, otherwise the filter has no effect.

Original image

Bumpmap

Filter applied


	If the image is in grayscale mode or indexed mode, this menu entry is disabled.

This filter is found in the main menu under Filters → Decor → Add Bevel….

Thickness: You can specify the thickness of the bevel, in pixels. Maximal thickness is 30 pixels.
Work on copy: If checked, the filter creates a new window containing a copy of the image with the filter applied. The original image remains unchanged.
Keep bump layer: When checked, you will keep the generated bumpmap as a new, not visible layer:

Layers Dialog with Keep bump layer enabled