I’m used to using the AE Motion Tracking and was familiar with the basics of Mocha however some of these shots were much more complex than I’d been used to.

For example, they’d filmed a man holding (and moving) a newspaper and wanted another CGI newspaper adding on.  To make it more complicated the newspaper was occluded by 2 people waking past.

I looked into some advanced Mocha techniques and used several AE scripts to help ensure an accurate track.