telophase: (l - damn i'm cute)
telophase ([personal profile] telophase) wrote2010-04-14 09:30 am
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Quick Perspective Cheat Sheet

[personal profile] yhlee had a few questions about perspective, and I don't know if his will help, but if so then hey. And it may help someone else, too.

This is a quick-n-dirty guide to perspective and figuring out how to get several objects in a picture into perspective without mucking about with drawing perspective lines and all that, told me by Brian Stelfreeze the comics artist, at an AggieCon lo these many years ago.

It assumes that you're OK with proportions in one object at a time - like you can draw a reasonably decent-looking single thing like a person, or a building, etc. It works best for eye-level perspective - you could probably work out a simple version of the same rule for high or low perspectives, but I haven't bothered to do that yet, as the vast majority of my work is done at eye level. :)



First, you start with your horizon line, in this case, looking straight on into the picture (roughly eye-level).





Second, put one object in, in this case a person. Note where the horizon line crosses that object, in this case at the shoulders.





Now HERE is the secret!

All other objects of about the same size ... will cross the horizon line at the same point, no matter how far away...




...or how close they are.




"But [personal profile] telophase!" you say. "I have objects of different sizes within my picture!" Easy. Just draw those objects in proportion to the object they are closest to. Let's say this picture is going to be a bunch of people with dogs. Here's the first one...





And the second...





And the third!





So you see, it's a quick-n-dirty way to make a picture look good. You might get individual bits a bit wrong, but if you fool the eye for the larger parts, then it tends to stay fooled for he smaller parts.

This is also not good for complex perspective with more than a couple of vanishing points, or if you're trying to draw, say, a cityscape from above, but by the time you can handle complex perspectives like that, you're already farther along than you need to be for this trick. Also, you may not have TRUE perspective, but the sad secret about TRUE perspective is that you often have to cheat anyway: true perspective often makes things extra-close to you look distorted, because the brain compensates for that in our visual field. So if you draw out all your perspective lines and throw in some buildings, for example, and the ones closer to the "camera" look all weird ... YOU HAVE NOT DONE ANYTHING WRONG. Probably. (In those cases, you'll have to work out how to cheat so the closer buildings don't look bizarre.)
softestbullet: Aeryn cupping Pilot's cheek. He has his big eyes closed. (Foto/ like grace from the earth)

[personal profile] softestbullet 2010-04-14 03:12 pm (UTC)(link)
...Whoa. I've already learned about perspective, but for some reason this never occurred to me! What an awesome shortcut! :DD

[identity profile] sartorias.livejournal.com 2010-04-14 03:31 pm (UTC)(link)
That is awesome--makes a difficult thing immediately identifiable.

[identity profile] telophase.livejournal.com 2010-04-14 03:50 pm (UTC)(link)
It was so obvious when he told it to me, but it's the sort of thing I'd never have figured out on my own. XD

[identity profile] wistfulmemory.livejournal.com 2010-04-14 04:41 pm (UTC)(link)
Wow...I'm not an artist at all, and I found this fascinating and helpful. Thanks for sharing it.

[identity profile] rachelmanija.livejournal.com 2010-04-14 05:58 pm (UTC)(link)
Oh, that is so cool!

[identity profile] rushthatspeaks.livejournal.com 2010-04-14 07:23 pm (UTC)(link)
Wow. That feels as though it should have been intuitive, but I would absolutely never have figured it out.

[identity profile] telophase.livejournal.com 2010-04-14 07:33 pm (UTC)(link)
If I had a 3D program installed on this computer, I'd try setting up a scene like the one above and then moving the camera to a low angle and a high one to see what simple rules like the one above I can come up with - I assume the same point on the object is the same distance below or above the horizon line, but I don't know if it's an absolute distance that works for all the objects, or if it's a proportional distance related to the size of the whole object. Hm.
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[identity profile] telophase.livejournal.com 2010-04-14 08:40 pm (UTC)(link)
Yay! Glad to help!

[identity profile] sparkylibrarian.livejournal.com 2010-04-14 10:08 pm (UTC)(link)
That is totally succinct and understandable. So much more so than what I think my drawing teacher tried to say... 17 years ago.
chisotahn: Firebird with the text "Firebird's Child". (Default)

[personal profile] chisotahn 2010-04-15 01:39 am (UTC)(link)
I have a degree in art, and none of my professors explained this in this fashion. I think I might have had a slightly better grade in one class if they had... :D

[identity profile] telophase.livejournal.com 2010-04-15 03:02 am (UTC)(link)
I have learned more by watching Brian Stelfreeze paint for an hour than I have in an entire semester of painting class. Seriously. If you're ever at a con he's at, find him and ask questions! He's awesome at teaching little moments like this.