The Distortion > Bump effect
The Bump effect allows the creation of a relief, which will be provided by a source image, over the current layer.
The more luminous the source image is, the more important the relief of the pixels in the current image is. The darker the source image is, the less visible the relief is.
On the right below, the source image and the current image are the same. It gives a feeling of relief on the whole screen.
Current imageSource image = Current image
Source Image = TVPaint logoSource image = paper
* You can adjust the depth of the relief and soften the borders using the numeric fields Depth and Smooth.
* A relief requires a lighting to be visible : thanks to the Apply with menu, you can define a centered lighting thanks to the Center option, or a directional lighting (Direction option) whose angle will have to be adjusted.