Attached Link: http://www.multimania.com/arte/indexeng.html

Sure, the sun inside will not help you. Put some point lights in the middle of the room (Vue 2.1 and Vue 3.1). In Vue 4 it is to use carefully. If you choose white walls and a white ceiling, you can make it whiter. Double-click on the material to open the material eitor. Then go to the EFFECTS tab and if necessary bring up diffuse and ambiant light to 100%, or less... you have to try out. Don't forget to put some windows (boolean) in your walls to have also the sunlight or the daylight come in. And have a look at my tutorials for beginners if you need to know more about it (english and french language):-)