Probably a stupid question but....

[triplej96]

How do you create those before/after wipes you see in tutorials?

 

[SeanEmer]

can you supply an example of what you mean?

 

[triplej96]

Oh sorry here you go like this. Seems very easy and thanks for the help.

http://www.youtube.com/watch?v=UobxabpUGF4&mode=user&search=

 

[SeanEmer]

Use masks. In that video they were just demonstrating color correction, so the color correct layer was on top of the original layer, and a mask was animated to move across the image.