Parameter setting results are interactively displayed in preview. Scroll bars allow you to move around the image.

This drop-down list allows you to select the image that will be used as a map for bumpmapping. This list contains images that are present on your screen when you launch the filter. Images opened after starting filter are not present in this list.

This option allows you to define the method that will be used when creating the map image:

Bumpmapping tends to darken image. You can compensate this darkening by checking this option.

Bright pixels default to bumps and dark pixels to hollows. You can invert this effect by checking this option.

If you check this option, there will be no relief break if you use your image as a pattern for a web page: patterns will be placed side by side without any visible joins.

Azimut: This is about lighting according to the points of the compass (0 - 360). East (0°) is on the left. Increasing value goes counter-clockwise.

Elevation: That's height from horizon (0°), in principle up to zenith (90°), but here up to the opposite horizon (180°).

With this slider, you can vary bump height and hollow depth. The higher the value, the higher the difference between both. Values vary from 0 to 100.

With this slider, you can adjust the map image position compared with the image, horizontally (X) and/or vertically (Y).

If your image has transparent areas, they will be treated like dark areas and will appear as hollows after bumpmapping. With this slider, you can reduce hollows as if sea level was raising. This hollows will disappear when sea level value reaches 255. If the Invert Bumpmap option is checked, transparent areas will be treated as bright areas, and then Sea Level slider will plane bumps down.

This slider controls the intensity of ambient light. With high values, shadows will fade and relief lessen.