The Clone Brush is used to copy parts of an image to another location within the same image or to another image.

Use the Brush panel to load the brush shape and to define Size, Hardness, Step-Size and Distraction of the brush. Enable the Spray switch to draw without having to move the mouse.

The Source Texture defines the texture that is cloned. Parts of it are copied over to the target texture while you are drawing.

Hold down the ALT key to have the cursor change into the clone cursor . After that click on the texture that you want to be cloned. Release the ALT key and click on the target texture. The Offset values will be adjusted so that the clicked position on the source texture is copied to the area where you clicked on the target texture.