Whoa! The last is great.

Some good work there .......... but if I may offer some constructive critique.

You either have Anti aliasing problems in the sim ....... or when you transfered the image of the aircraft onto the background they weren't the same width. eg the background was 1280 wide and the aircraft was from an image of another resolution, so when everything was scaled down to 1024 the aircraft looks distorted. This is more obvious in the HR images.

You also need to take a little more care cutting out the aircraft..... if you don't know how learn to use the pen tool (or similar) in your editing suite of choice. After that use magnification and a layer mask with a small brush to edit out any rough edges ...... an example being round the engines of the C130.

Hope this helps for the future ...... keep up the good work.

Thanks for the comments, I'll try to do better on the cutting out the planes. I was using the magic wand tool, not the pen.