Refining tracked artwork

We've integrated the front of the MattePainting building into our scene and it…looks pretty good right now.…There are a few places we can make some adjustments however, if we zoom in and…take a look at it, there are some issues with the perspective.…Now what's happening is in the original footage there's a lot of lens distortion.…So what happens is on certain frames you can see that the foreground building is…curving, it's not perfectly straight.…First frame looks okay, if you compare the Foreground building to my new…building, all the lines that run vertically are pretty parallel.…

I'll go to the last frame though.…We'll see it looks like the new building is dipping inwards or you can see that…the original building is bowing towards the sky.…So the original building, if you trace it upwards, is no longer a perfectly…straight line, it looks like it's tipping towards the sky.…In any case, it looks like these lines arranged vertically are no longer parallel.…So let's try to deal with that.…I'm going to go back to the FoundryCameraTracker composition and one thing we could do is…