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What are the rules of perspective when drawing?

I would like simple rules to follow, I have books that go into such detail I think my head will explode. Simple rules is all I am asking for.

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MelissaA441 year ago

http://www.amazon.com/Theory-Practice-Perspective-Dover-Instruction/dp/0486449076

Rules of Perspective

1 - all straight lines remain straight in their perspective

2 - vertical lines remain vertical (don’t curve) - “but it is not an uncommon error to suppose that vertical lines of high buildings converge towards the top. they would if we stood at the base of a building and looked up. but in this case our point of sight and our horizon line would be in the sky. but standing sufficiently far away as to bring the whole of the building within angle of our vision and point of site down to the horizon then these same lines would appear perfectly parallel

3 - horizontal lines parallel to the base of the picture are also parallel to the base of the of the picture (that is if your lines in the thing your drawing are horizontal and parallel to the ground then so should your drawn lines)

and there are a few more but this will get you started

iceng5 years ago
The art of perspective goes beyond rendering 3D images on a 2D surface
with vanishing points.

But is the supreme art of altering grand Greek structures like the Parthenon
to make them more pleasing and correct to the casual observer.

This means if you apply a straight edge to parts of the temple it would
show it to be bowed by the ancient stone masons.
Go read the pointer and be amazed.

A
FoolishSage5 years ago
Perspective comes down to one issue: vanishing point(s). This between one and three points (usually) where lines disappear into.

First choose how many vanishing points you want. Each amount will create a different effect.
-1 point: you are looking at something straight on. Only the "depth" lines go to the vanishing point, other lines are parallel to the side and top of your drawing.
-2 points: You are looking against an edge of the object. Both the "depth" and "horizontal" lines go to vanishing points (each axis to its own point). the "vertical" lines remain parallel to the side of your sheet.
-3 points: you are looking at a corner of the object. All three axis go into their respective vanishing point.

Second place the vanishing point(s) on or off your image. Again, different placements will create different effects.
-On the image creates depth (in)
-Off the image creates volume (out)

Thirdly create your image based on a real or imaginary grid with the lines going into the vanishing point and those parallel to the edges. If you are starting up feel free to sketch the grid in lightly and remove it after. Once you get the hang of it the grid will be firmly in your mind and you wont need to sketch it out.

Don't worry if it takes a while to get the hang of it. Even van Gogh "cheated" on perspective with a perspective frame ;)
I forgot to mention. More than 3 vanishing points can be used for strange (but possibly interesting) effects.
perspective.jpgcity_large.jpgperspective-parallel-lines.jpgperspective-sketch.jpg