Knight Invaders

This is a project for my photoshop class. First I tried taking my own pics and do a arm and sword coming out of a book. But it was a disaster and I was on a deadline.

Then i stumbled upon this sites amazing stock library and was inspired. I was going to do a winged knight defending a castle from a dragon. But then I thought knights always fight dragons, why not something else.

Out of that came this! Feedback is strongly encouraged. please comment.

Thanks to all the awesome stock photos. Credit is given below.

Pics:
Castle- McFly1980
Wings- Nightgraue
Field- SalsolaStock
Cow- cyborgsuzystock
Knight- Gumbo-alokoi
Shield- faestock
UFO Building- fa-stock
Aliens- Selfcide-stock Grey002 Grey004 Grey005

Brushes:
Lightning brishes- digital-nexus
Beam brushes- ZaKe
Tree Brushes- spiritsighs