What you see here is the result of a bit of experimentation. With Autocad the trick is to make sure LIGHTINGUNITS is set to either 1 or 2 and that you have sky background and illumination selected. It also pays to open the Advanced Render settings and make sure Final Gather is ON. The foliage in the foreground was cut and pasted in afterwards in Photopaint.
No Sky needed in the night shot but it seems it stayed on anyway!
These are a friend's design, the first is a renovation of the front of an existing house and the second is a bachelor pad, to go in a large backyard. The first one has scorched weatherboards.
Apparently this protects the wood for about 80 years.