As you know, I sent an e-mail  about the house photo and contrast.  I have done a very simple levels adjustment which shows quite a difference.  However, I will not post those here of your image unless you say it is ok.  If you prefer, I can put the very simple correction in  a locker you can go to and see.  (Film instructors can give advice on gettng more contrast in the original shot.)

I don't know what sort of photo editing software you have. You certainly have the 3d stuff to do the intriquing and fine renders in Terragen.   For photos, you may or may not have what you need to do editing of a digital image.   If it is ok to post the very simple contrast adjustment on the house image let me know.   Don't expect much...I did not do much but do show how it was done.          Tom. 

PS. The idea that you are posting and asking is super. There are many here much, much better than I am but I can help some.  This place is really what got me back into photos again and got me better than when I started here.