love.graphics.setColorMask
Sets the color mask. Enables or disables specific color components when rendering and clearing the screen. For example, if '''red''' is set to '''false''', no further changes will be made to the red component of any pixels.
love.graphics.setColorMask( red, green, blue, alpha )
red boolean Render red component.
green boolean Render green component.
blue boolean Render blue component.
alpha boolean Render alpha component.
love.graphics.setColorMask()