This effect was created in Adobe After Effects using the camera projection technique. I had four different PNG files which where edited into different sizes. When you first import your footage into After Effects, it imports it as a 2D composition, so we had to create a virtual 3D camera in After Effects , in the camera creating options you can choose from various preferences like what lens you want on the camera, i picked the 35mm lens so it could pick up a decent amount of DOF (Depth Of Field). At the bottom of the viewing screen there is a button which should say active camera, when you click into that it opens a little tab which has options like top, bottom, left, right. i clicked on the top button which allowed me to see the composition from a birds eye view, once in this mode we could move each PNG image further back to create perspective. once all of the images were in the correct place i moved the focus point of the virtual camera to the furthest point which was the sky by clicking and dragging the middle crosshair to the back line which is the sky.
after this i key-framed the Y axis of the comp to make it look like the viewer is peeking over the wall, i also key-framed the aperture of the virtual camera so that at the start the sky is really out of focus and as the camera rises slowly the aperture returns to perfect focus.
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