Hi guys. This is a tutorial inspired by Paolo Rivera's timelapse (click here [link]
and check it out, it's awesome) where he uses smart objects to have more control over his perspective jazz. I tried recreating how he did it and it worked, but he may use some other method. The Photoshop version I used was CS 6, so your mileage may vary.
I've made a psd with two grids, one checkered (like the one he uses in the video), one with just lines and a diagonals layer, check it here: [link]
Anyways, hope you guys like it and find it useful! Cheers.