This seems interesting . I'm not sure how they got their demo scene looking so photo real.  Combined with the realistic camera motion, their scene looked photo real.

These are two very good videos that will get you off to the races, if you want to make Star Wars type dog fights.   (You could replace this with whatever ships you have though.) FYI any clouds will make your renders super slow.  Adding vfx pre rendered will help with this, but you have to be careful for simple camera moves if you do that.

These are all the Pwinsher challenger compilations.  

When you watch them, try to see what works and doesn't.  You can tell basically after awhile what the good ones are.

Top 100 3D Art Montage | Chasms Call

This is one of the most comprehensive workflow Tutorials for Landscapes in blender.  He talks about how to blend textures, use meshes instead of displacement, and using lattice for randomness.   If you watch this video 3 times, first take the info in.  Second, take notes, third, Try different parts using his Add on. (free version)

For those of you who don't know Humble Bundle sometimes has tons of assets bundled for about 30$   They also have a awesome 1$ deals too.  

Grab, sometimes hundreds of Models, Set Pieces, or Characters for $25 or $30.

www.HumbleBundle.com

The secrets of luminaria contest.