Hi there, Blogviewers! I thought I would share a few observations I've made about pespective. This post deals specifically with calculating the distance between multiple vanishing points, panned perspective and warped perspective. We start our journey with these photos my brother took with multiple lenses. The first was taken using a 24 mm and shows very little perspective warping. This kind of layout would be easy to replicate using only 1 pt perspective.
http://www.samrohn.com/) I say 'pretty much' because this abstraction breaks if you tried to keep all three axis ( X Y and Z) reletivley undistorted ( notice that the upper and lower areas are totally unrecognizable). computers use this type of image to create skyboxes for games, creating an undistorted 360 degree image, so long as you're looking througha virtual camera to limit the field of view to something more human. (Again, check out that Sam Rohn guy- his website does what I'm talking about)
I'm glad you asked. Armed with this knowlege, you now know a bunch of new things:
> this is another checkmark to ensure that you're drawing accurate perspective. If you have two vanishing points on a page, make sure you know why you're placing them there; are you absolutley sure your layout wouldnt look more accurate if they were farther apart? 90 degrees apart?
> This trick works horizontally, or vertically (again with the elevator shaft) no more guessing what warped perspective looks like!
>Impress your friends at parties!
>reverse engeneer photos, and match BG plates easier, if you're into matte painting
>Fool-proof panoramas and wideshots for 2d layout. some fudging required if you have to move horizontally and then vertically in the same camera move.
I hope you all find this as fascinating as I did. I want to talk about rotating objects in perspective as well as 3 pt perspective if I ever do another one of these blog posts.