• Drop Shadows
• Unsharp Mask
• Adjusting Contrast
• Bump Mapping
• Image Watermark
• Gradients Tutorial
• Colour Enhancing
• What are Layers?
• GIMP Interface

GIMP Contrast mask tutorial

Create and assign modes to new layers

On the main GIMP toolbar, open the layers dialogue found under

Windows » Dockable Dialogs » Layers

In the layers dialogue click Duplicate and create 2 copies of your image.

Select Background copy#1 and change its Mode from Normal to Hue.

Now duplicate this layer and change the new layers Mode to Saturation.

To make life easier for this tutorial I'll rename the layers to reflect their mode state.

To monitor the effect of the next stages turn off the hue and saturation layers (by clicking on the layers eye). Then select the layer named overlay and change Mode from Normal to Overlay.