Motion Tracking + Masking Tests
| May 8th, 2009The goal of this series of tests was to setup and connect multiple motion tracking points and fill the resulting triangular “cells” with different video. After Effects doesn’t allow point manipulation of objects/masks, so I had to figure out a way to create the triangles that the connected tracking points formed using the motion tracking data.
To do this, I worked with each triangle individually. I created three solids (black rectangles) and set their position and rotations to match the position and slope of three lines of the triangles. I lowered the opacity of the rectangles and assigned the multiply blending mode. Using the Alpha Levels Effect I was able to make the overlapping area pure black and everything else pure white. The resulting comps worked as my track mattes for the second video.
Here are a few of the steps I went through:



