Position of the Sun
To illuminate 3D scenes, the software uses internal light sources, with default settings that can be switched on and off with the 
button. Furthermore, for each 3D view, individual settings for geographical position, date and time of day can be specified under ‘Position of the Sun’, and for the light sources simulating the sun and moon, the colour and intensity of the light. Thus the software makes it possible, with appropriate settings for the project, to check in the various views the effects of shade on the building at different times of the day.
More:
Geographical Location
Time and Date
Sun
Environment light
Moon