To see RAL Kit Homes in 3D just click on the required component , hold with left mouse button , "drag" to required location within the black rectangle , then release the left mouse button. Enjoy! Note only up to 5 copies of each component can be dragged. To start again click "refresh" on the browser toolbar.
Start from the top left or top right of the rectangle and progress down the screen as needed. Remember clicking on a component brings it to the foreground.