A user interaction system for controlling a lighting system comprising a plurality of controllable light sources for lighting an environment, the user interaction system comprising: - a display configured to display a camera image of a part of the environment, a subarea image and an overlay image , the subarea image being an image of a specific subarea of the environment, - a user input means configured to receive a user input comprising a location indication related to a point or location in the subarea image , - a location identification means configured to detect which specific location in the environment is indicated by the location indication , and - an overlay image creator configured to generate the overlay image comprising information related to a lighting effect which is obtainable by the lighting system at the specific location, the obtainable lighting effect being a combination of lighting effects of at least two of said plurality of controllable light sources, the information related to the obtainable lighting effect being based on a lighting system model representing lighting effects that are obtainable in the environment by said plurality of controllable light sources, characterized in that the user interaction system comprises a camera configured to obtain the camera image and the subarea image , wherein the camera comprises at least one of: means for detecting a location of the camera , means for detecting a direction in which the camera is directed, a tilt sensor to detect the tilt of the camera , and means for detecting the angle of view of the camera , wherein the location identification means is configured to detect which specific subarea of the environment is imaged in the subarea image based on at least one of: the detected location of the camera , the detected direction of the camera , the detected tilt of the camera , and the detected angle of view of the camera , respectively, and wherein the location identification means is configured to base the detection of the specific location on the detected specific subarea. - a display configured to display a camera image of a part of the environment, a subarea image and an overlay image , the subarea image being an image of a specific subarea of the environment, - a user input means configured to receive a user input comprising a location indication related to a point or location in the subarea image , - a location identification means configured to detect which specific location in the environment is indicated by the location indication , and - an overlay image creator configured to generate the overlay image comprising information related to a lighting effect which is obtainable by the lighting system at the specific location, the obtainable lighting effect being a combination of lighting effects of at least two of said plurality of controllable light sources, the information related to the obtainable lighting effect being based on a lighting system model representing lighting effects that are obtainable in the environment by said plurality of controllable light sources, characterized in that the user interaction system comprises a camera configured to obtain the camera image and the subarea image , wherein the camera comprises at least one of: means for detecting a location of the camera , means for detecting a direction in which the camera is directed, a tilt sensor to detect the tilt of the camera , and means for detecting the angle of view of the camera , wherein the location identification means is configured to detect which specific subarea of the environment is imaged in the subarea image based on at least one of: the detected location of the camera , the detected direction of the camera , the detected tilt of the camera , and the detected angle of view of the camera , respectively, and wherein the location identification means is configured to base the detection of the specific location on the detected specific subarea. <EOS>