Hi there,

It's been a while since I've been really into brickfilming but I' starting to get into it again as I've been
finding all sorts of useful editing and special fx programs.

Like T@B ZS4 for example.

T@B ZS4 is a free editing program that allows one to add special fx and green screening.
You can download it here if you like: http://www.zs4.net/free-software-downloads

Now thanks to tutorials across the net, I've gotten a pretty good idea how to use the green screen,
but I'm having some trouble with one thing.

At the moment I'm trying to make the background be a moving part of the scene while the other part be of a ship.
I want to make it like it's flying over a city or something.
But when I put it into the mixer, the output comes out totally black and I can't crop it or anything like you would a picture.

Both clips are Avi and were both made with SMA (Stop Motion Animator).

So if anyway has any ideas on what I could do, please let me know.
Thank you very much.