A method and implementing computer system are provided for enabling a user to paint a surface a desired final color while using a paint, the color of which appears in raw form different from the desired final color for the painted surface. In an exemplary embodiment, a tile painting application is illustrated and includes a camera arranged to take an image of a bisque tile. When a user applies a glaze to the tile, the camera-computer system analyzes the glaze color among other factors affecting the painting process and an image showing a final color of the tile after firing is presented on the display of the computer system such that by looking at the computer screen, the user is able to see the actual final color of the tile after firing while applying the initial glaze to the bisque tile before firing.