After the 3D camera tracker effect analyzed my footage it displayed all the track points correctly. If I right-click on the target and select "create text and camera" everything works the way I expected.
However, I want to apply the same effect to a drawing (Paint effect) instead of text. If instead of "create camera and text" I select "create camera and null object" the null object is created. I was expecting that I could then parent the null object to the layer where I have my drawing, but it doesn't work. The camera changes positions but the null object doesn't, so I think that the values aren't being passed to the layer with the drawing.
What's the best way to make an image layer move around based on the 3D camera tracker?