How to draw perfect square in perspective?

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  08 August 2013
How to draw perfect square in perspective?

Hi,

the reason I'm asking - it is a well known fact that to draw a perfect circle in perspective - it has to be drawn inside a perfect square. And if your square is actually a rectangle rather than a square - you'll end up drawing an ellipse in perspective and not a circle..

So, the question is - how do I know that I'm drawing a perfect square? I can't find the answer - be it in Photoshop or on a paper. Pleas help!
 
  08 August 2013
Being as this is a matte painting forum, drawing a perfect circle by hand isn't really useful. But instead, you would use the tools available to you to make that circle. If it was paper, you should use a compass, or at least a ruler to draw out the four sides then create a grid to where you can draw approximately the circle, or get a hemispherical ruler to draw it.

If you're in Photoshop, use the circle lasso tool and hold SHIFT to make it a perfect square. You can also drag out ruler guides on all four sides, and use a lasso tool to again draw the perfect square bound within those guide lines. You can then transform that, and warp it to whatever perspective you want for your painting.
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  08 August 2013
A cylinder

I think this is a trick question. A perfect circle in perspective is a sphere, right? That, or like an alternative version of "Tool". Either way, I think the answer is: Maya

Just to save time, right?!?

If you want to work it out in 2D, it depends on the angle because that determines the foreshortening. So, the expression "in perspective" is rather general.

I actually use the line tool and create really old fashioned grids to work out perspective in my DMPs all the time.
However, I'm sure Google can offer some basic perspective tutorials and video.
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  08 August 2013
Ackdoh, Milanschere

Thanks for replying! But I think I wasn't clear enough about what I mean.

I of course can draw a perfect circle and a perfect square on a flat surface both in PS and on paper. I'm only having problems with drawing it in perspective. Let's for a moment forget about circle. Lets say I want to draw a Cube hanging in the air on a 2-point perspective. How do I know that I'm drawing an absolutely equal on all sides Cube? I've attached an example of what I'm saying. Simply put, I'm not absolutely sure where to place those red lines for it to be a perfect cube. Thanks!

Of course I can place them approximately, but anyways, I wanted to know if there's a mean to draw a perfect cube or square anywhere on a 2 point perspective.
 
  08 August 2013
A perfect cube in perspective

Dear Defonten,

Please accept our apologies if we have misunderstood your question. Perspective is one of the major pillars of Matte Painting. Where I grew up it was mandatory in grade 6 to learn all this, so I did not understand the basis of your question.
Once again, please accept my apologies for any misunderstandings. I'm more than happy to answer your question though. Here's a selection of what Captain Google spat at me when I searched for an answer to your question:
1. http://www.youtube.com/watch?v=OB3UEpxFlj8
2. http://www.youtube.com/watch?v=fm8MAhLfBu0
Two videos that explain the process better than I could (in any language).

I've also found this for you:
Step 1
http://www.conceptart.org/forums/at...=1&d=1220935092
Step 2
http://www.conceptart.org/forums/at...=1&d=1220935097
Step 3
http://www.conceptart.org/forums/at...=1&d=1220935105
Step 4
http://www.conceptart.org/forums/at...=1&d=1220935121
Step 5
http://www.conceptart.org/forums/at...=1&d=1220935126
Step 6
http://www.conceptart.org/forums/at...=1&d=1220935133
Step 7
http://www.conceptart.org/forums/at...=1&d=1220935157
Step 8
http://www.conceptart.org/forums/at...=1&d=1220935165
Step 9
http://www.conceptart.org/forums/at...=1&d=1220935194
Done
http://www.conceptart.org/forums/at...=1&d=1220935202


Hope this helps.

If you have any further questions, I'm sure David, myself or some of our other members will gladly try to assist you.


Kind Regards,
Milan
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  08 August 2013
http://www.thegnomonworkshop.com/st...-1#.UgwDUBaBPPg

I know its a little expensive and not a Ballistic publication, but this video explains it in minutes. Learnt so much about perspective I bought the entire set.

Its a simple trick to get a perfect square in perspective, if look at how Gary does it makes sense.

I often rewatch these time and time again, also I am going to put the video through my edit software and metadata important parts.

David Mattingly book has a wonderful section on perspective also.

not much help but can push you in the right direction

Richie
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  08 August 2013
Thumbs up

Milan! Thanks a lot for such a in-depth reply and information man! U have just made my day ) The very first video did the trick for me! I'll also explore the rest of the links that you gave!

Rockhoppermedia, whoa, that looks like a huge material to learn! I'm already downloading it! Thanks!
 
  08 August 2013
No problem Natiq, glad to have been of some help,

Richie,
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  12 December 2013
I made a video earlier this year that shows how to find the station point, the measuring points, and of course, how to draw a perfect cube in 2pt perspective.

You can find the video here: http://www.youtube.com/watch?v=OB3UEpxFlj8

I use illustrator for the demo, but if doing it on paper you just need a ruler and a pencil. A compass and a triangle like a 30/60/90 or a 45/45/90 would make things easier; however, it's still quite doable without them.
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  12 December 2013
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