Chameleon Brush copies a fragment of an image from one part to another with respect to the color range, tone, texture, illumination, and other characteristics of the background, to which the clone is applied. Unlike the Clone Stamp tool, this preserves the characteristics of the underlying image
To clone an object first choose Chameleon Brush from the left, and select an image source by holding down Alt (Option on Mac), and click the left mouse button over the area from which the cloned fragment will be selected.
Once the reference point is defined, move the cursor to another location. To place the cloned fragment click the left mouse button. When the left mouse button is released, a cross-shaped cursor will appear over the source area, to indicate from where the clone fragment is selected.
The basic tool settings are shown in the Tool Options panel above the Image Window or by right-clicking on the image. To display the full list of parameters, press the tool icon in the Tool Options panel or use the F5 key. To specify the parameter settings, enter a numerical value in the parameter’s field or use the slider.
Element - in the drop-down list, select the type of the basic element of the brush: Ellipse or Select Shape.
Size (1-5000). Diameter of the source area, from which the fragment is cloned (in pixels).
Fill (1-100). The opacity of the clone in a single brush stroke. When applying strokes to each other, the opacity of the clone increases.
The check-box Aligned. This parameter sets the cloning method. When the check-box is activated one clone is created from an area: in this case each new line draws information from the relevant area around the source point. When the check-box is deactivated, each time the mouse button is clicked, a cross-shaped cursor will appear above the source area, and new lines will create a clone from only this area.
Activating the Flip Horizontal check-box allows a clone to be mirrored along the standing axis, i.e. interchanging the left and right sides.
Activating the Flip Vertical check-box mirrors a clone by turning the image upside down.
Scaling (20-400%). The size of the clone relative to the original fragment.
The check-box Artistic Cloning temporary disables the consideration of the neighboring pixels when applying a clone fragment. In this mode you can change size of the brush, choose a new source from which to copy a clone, remove parts from a clone area, etc.
To remove a part of the clone, press the Ctrl-key on the keyboard (⌘ on Mac) and, keeping it pressed, draw over the area. This is useful when cloning from a large image or creating a clone from different parts of an image. The clone will be processed after is pressed.
In addition to the above-mentioned parameters, you can adjust the advanced settings that affect the shape and position of the clone.
Press the Default button to set all settings to their default values.
To draw a straight line, first specify the starting point with the left mouse button, then, while keeping Shift pressed, move the cursor to the desired end point of the line and release Shift. If Shift is not released, a new line will be drawn to each point where the mouse is clicked.