BORIS FX: Boris FX Forum Boris FX Tutorials After Effects Motion Graphics

crop a corner

COW Forums : Boris FX

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
Axel Andycrop a corner
by on Feb 11, 2009 at 9:12:54 pm

I don't know if "crop" is what I want but here's what I'm trying to do...

I have an image on the lowe track. (It is the video source.
I picket gate closes over the image so you can see through the gate. the gate is rounded at the top. I want to lose all of the video that falls ouside the gate. I can easily crop the straigh sides but since the top is rounded I don't know how to crop the corners. I can get the pixel chooser to identify what I want to keep/take away but I don't know what filter would do that. Is there an opacity filter with a pixel chooser?

Regarding the gate swinging shut. I'm using a page turn. It will do but it looks more like a page then a solid gate.

Thanks in advance. (Red - 3.04)


Return to posts index

peter mcauleyRe: crop a corner
by on Feb 12, 2009 at 2:23:39 pm

Hi K,

You should be able to drop the gate image into the mask track to generate transparency.

If you like, you can send me the RED project via yousendit ftp and I'll set it up and send it back to you. You can send that to me at And just a frame or two of the media would be enough to set the project up for you.



Return to posts index

Axel AndyRe: crop a corner
by on Feb 15, 2009 at 10:52:39 pm

Somehow I got it do be...just okay.
Now I'm on to trying to find good tutorials. I'll do a separate post.


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 All Rights Reserved