A method for a user to paint an image includes generating a display of a room image uploaded by the user. The method also includes employing a straight-line masking tool to block off a first area of the room image with a straight line such that color will not be applied to the first area when color is applied to a second area of the room image. The method also includes employing a polygon masking tool to draw at least three lines to mask off a selected polygon area of the room image such that color can be applied by the user to an inside of the selected polygon area when the user selects the inside of the selected polygon area and an outside of the selected polygon area when the user selects the outside of the selected polygon area.