A system comprising: an illumination device; a remote controller having a graphical user interface, GUI (65, 70, 80, 90), adapted for creating a first scene and a second scene among a plurality of illumination scenes forming a first natural show at a first brightness level; wherein the GUI (65, 70, 80, 90) is adapted to assign a first color temperature at a first brightness level of the illumination device to form a first scene at a first time of day; characterized in that wherein the GUI (65, 70, 80, 90) is adapted to assign a second color temperature at the first brightness level of the illumination device to form a second scene at a second time of day different from the first time of day; and a storage medium within the illumination device configured to store the first and second color temperatures at the first brightness level for the respective first and second scenes to form at least a portion of a first dimcurve mapping of the first natural show; wherein the GUI (65, 70, 80, 90) is adapted for creating a third scene and a fourth scene among the plurality of illumination scenes forming a second natural show at a second brightness level different from the first brightness level; wherein the GUI (65, 70, 80, 90) is adapted to assign a third color temperature at the second brightness level of the illumination device to form the third scene at the first time of day; wherein the GUI (65, 70, 80, 90) is adapted to assign a fourth color temperature at the second brightness level of the illumination device to form the fourth scene at the second time of day; and wherein the storage medium within the illumination device is configured to store the third and fourth color temperatures at the second brightness level for the respective third and fourth scenes to form at least a portion of a second dimcurve mapping of the second natural show; and wherein the difference between the first color temperature and the third color temperature is greater than the difference between the second color temperature and the fourth color temperature when the second time of day is closer to local noon time than the first time of day. an illumination device; a remote controller having a graphical user interface, GUI (65, 70, 80, 90), adapted for creating a first scene and a second scene among a plurality of illumination scenes forming a first natural show at a first brightness level; wherein the GUI (65, 70, 80, 90) is adapted to assign a first color temperature at a first brightness level of the illumination device to form a first scene at a first time of day; characterized in that wherein the GUI (65, 70, 80, 90) is adapted to assign a second color temperature at the first brightness level of the illumination device to form a second scene at a second time of day different from the first time of day; and a storage medium within the illumination device configured to store the first and second color temperatures at the first brightness level for the respective first and second scenes to form at least a portion of a first dimcurve mapping of the first natural show; wherein the GUI (65, 70, 80, 90) is adapted for creating a third scene and a fourth scene among the plurality of illumination scenes forming a second natural show at a second brightness level different from the first brightness level; wherein the GUI (65, 70, 80, 90) is adapted to assign a third color temperature at the second brightness level of the illumination device to form the third scene at the first time of day; wherein the GUI (65, 70, 80, 90) is adapted to assign a fourth color temperature at the second brightness level of the illumination device to form the fourth scene at the second time of day; and wherein the storage medium within the illumination device is configured to store the third and fourth color temperatures at the second brightness level for the respective third and fourth scenes to form at least a portion of a second dimcurve mapping of the second natural show; and wherein the difference between the first color temperature and the third color temperature is greater than the difference between the second color temperature and the fourth color temperature when the second time of day is closer to local noon time than the first time of day.