Understanding perspective



  • I have gone through both classes on perspective, and am confused on one aspect of perspective. I can do one, two and three point perspective, and create a city street in each, but one thing twists my mind to the point of making me go crazy. Here is an example.

    0_1473822712347_image.jpeg

    How do you get each of these objects at different angles, yet still stay in perspective?



  • @Eric-Castleman This is an example of spherical perspective - it is used very often in comics, or when you want a particularly wide field of view or, on smaller scenes like this one, it can give a special sense of dynamic, danger, dream-ness or weirdness, or a combination of all. It simulates the effect of an extreme wide-angle or fish-eye lens (there is a strong correlation between type of camera lens and the setup of a perspective grid - my world got a lot richer when I understood this!)
    In theory, all straight lines become curves in spherical perspective, but when the lines are very short (like here) it can be difficult to see - but you can see the curve clearly in the arrangement of the pile.
    Here is an example from Disney ("The hunchback of Notre Dame").
    alt text
    A good book that explains this (actually the only book I know that explains spherical perspective) is "Vaniahing point - Perspective for comics from the ground up" by Cheesman-Meyer.

    Vanishing Point



  • @smceccarelli great comment! Does procreate do this sort of grid where it will bend the grid?



  • @Eric-Castleman Ah! That would be nice! Unfortunately all automatic systems I know can only setup straight 1, 2 or 3 point perspective grids. For spherical grids I use a handy device called a "universal grid". I learnt that at school, I have never seen it described in any book. You can google and download a universal grid, it looks like this:

    alt text


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    I thing what Eric is actually asking is how do boxes move at different angles within a perspective piece (in relation to one another). In other words If you have a group of boxes done in two point perspective, it's pretty easy if they are all going back to the same vanishing points, but once the boxes get shifted around, it's a little trickier.

    The way to solve this problem is to KEEP THE HORIZON LINE CONSISTENT, but move where the vanishing points are. I typically just freehand it first to get it looking sort of right, then find the points. This helps it from becoming too stiff. Here's a quick drawing to show two objects in two point perspective that are at different angles.

    Hope that helps some. : )

    0_1473860476493_multi object perspective.jpg



  • @Lee-White thank you!!!!! I can't tell you how hard it has been to figure that out. You're the man!

    @smceccarelli though Lee is correct, your input also answered another big question for me. Thanks for being so active on these boards.


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