I have been enjoying using Mocha for tracking surfaces such as computer screens on moving camera shots and replacing the content. I am always amazed at how well Mocha handles most situations, albeit a kind of slow for long shots.

My biggest complaint is with the quality of the AE corner pin filter. Today I was placing a web page with a blue background and text on a white background onto the computer. (The information from Mocha, when pasted into AE, utilizes the AE corner pin to achieve perspective on the layer being composited, in this case a web page for the computer screen)

Where the white edge of the text page meets the blue background there is a very noticeable aliasing of the edge. Sort of a saw-tooth edge effect. To get rid of it I applied a blur as I needed to soften the inserted image a bit anyway. Thing is that the aliasing shouldn't be there with the corner pin filter and I think that Adobe needs to look at re-engineering this filter a bit. It's been around since the beginning and my guess is that the code has not been improved.

Just for fun I created the same perspective using CC Powerpin on a layer and guess what... no aliasing. Hmmmm, why is this plug in so much better?  Screen grabs or project available at no cost to any Adobe Engineer who is reading this.