The paint tool allows the user to manually edit the texture on the landscape to add detail or override the automatic generated texture. This tool uses a brush that consists of a pattern and a texture. These can be setup in the Paint Tool Settings dialog, which can be accessed by pressing the brush edit (...) button.
Brush: The size of the brush affects the number of pixels that are affected when the tool is activated. Use the circles for a quick change in size.
Brush Edit(...) Button: Activates the Paint Tool Settings dialog which allows the user to specify which brush is to be used for the tool.
Solid Colour: specifies the colour selection dialog to be used instead of a texture. This allows a specified colour to be painted on the texture.
Blend Strength: Determines how strongly the brush texture is blended with the existing texture when the tool is activated.