View Full Version : Round the back

06 June 2011, 05:28 AM
Im working on compositing a sequence that involves a woman in a streetscape
surrounded by a bunch of virtual screens which she is touching and interacting with. (

The screens are arranged cylindrically around her.

The way I have created this so far is in After effects a with a bunch of simple solids and applied a CC Cylinder Perspective Effect. I then comped this as 3d layer above the footage of the girl & Set the blend mode to add

It kind of works OK -but

What i really need to do is make the screens disappear when they go behind her. Without having the ones in front of her disappear too.

Maybe there is a better technique I could try?

Any suggestions???

Thanks in advance
V grateful for any help

06 June 2011, 07:43 AM
well, there are 2 options that i'm thinking about:

chose the screen that you want to disappear, and keyframe it's opacity when it goes behind her.

the other option is to just mask out (maybe it'll require a little of rotoscoping, depends on what you want to achieve) the screens when they go behind her.

06 June 2011, 01:51 PM
not an AE guy, but after you applied the cc cylinder on the screens, do they apear as a real cylinder in the 3d space? if so, then i would roto the girl, place that roto on a card in the 3d space in the middle of the cylinder and your done.

if it donest work the way above, you could try to build 2 half cylinders (each one only 180 degrees) the back one gets cut by the roto of the girl and the other one is always in front

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06 June 2011, 01:51 PM
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