From the course: VFX Techniques: Building Replacement with After Effects

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Faking reflections

Faking reflections - After Effects Tutorial

From the course: VFX Techniques: Building Replacement with After Effects

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Faking reflections

We have integrated the matte painting, so that's starting to look pretty nice now. Now we can move on and remove this original center building. Now the only way to do that is to simply rotoscope that and subtract it. So I can go down to my Background layer, where that building is right now and draw a new mask, I'll grab the Pen Tool, draw a mask that starts behind the foreground building, goes across and above the third building, which I do want to save and across in between the old building and the trees and then close that. Initially that mask is additive but I can go down to the new mask that I just drew and change that menu to subtract and there the building goes away. Of course, I need to key this over time so I am going to go ahead and key the first frame for mask path here then, go ahead and move to the last frame adjust that mask and then continue to bisect to key that, I'll do one more frame, move that over and then I'll let you do the rest of the keying, it probably will…

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