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Zbrush help - cameras get distorted (orthographic and perspective)

polycounter lvl 9
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krisCrash polycounter lvl 9
Usually after I've worked in zbrush for a bit, the feeling of perspective fizzles out of the view. And, then, if I check the orthographic view, things further away are actually bigger. I can adjust the angle of view on the perspective camera, but it's not quite the same as what it does naturally - I think. It usually breaks within an hour of me starting a sculpt.

I do my process by putting a cylinder or something into the canvas so I can get into Edit mode, then GoZ a basemesh from Maya (in meter scale). This way I've found to not have any scale issues down the pipeline.

Attached is a picture of the main symptom.

Anyway, how does it happen and how can I reset it? It seems to stick to the project .ZPR (document?) and not the zbrush session.

Replies

  • Neox
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    Neox godlike master sticky
    uhm you turned off perspective?

    while hitting P should fix this, keep in mind zbrush is 2.5d and has no real perspective
  • krisCrash
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    krisCrash polycounter lvl 9
    I guess I was not clear on this, both perspective and orthographic are distorted. It does not quite reach the inverted look in perspective but it's flattened and without things shrinking in the distance.
    To add to that, I'd like my orthographic view to work too, I think it's great for looking at proportions.
  • Neox
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    Neox godlike master sticky
    uhm orhtographic projection is by definition "distorted" due to the lack of distorrtion in one dimension. so i'm rather clueless what you expect the ortho to look like.
  • krisCrash
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    krisCrash polycounter lvl 9
    Can you please stop arguing this? Even in this orthographic, things further away are getting bigger than the nearer. I know what orthographic is, and the orthographic isn't being orthographic.

    My perspective view is still weird. For instance, revolving around a point on the mesh (as it usually does, centres on where you've last worked), it will zoom out much more. It's hard to get a consistent spin that's easy to work with. I am getting lots and lots of lens distortion, even in perspective.
  • Neox
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    Neox godlike master sticky
    Oh please, chill.
    You don't seem to understand what i am saying, what you see here is orthographic, the lack of distortion. Your brain is used to that distortion and tells you stuff gets bigger the further it is away and this is one of the main principles of orthographic. Nothing gets smaller the further it is away. Because of the lack of the 3rd dimension.
    I can even show you what your brain is doing, because everyones brain is doing it, mine including. You think the lines get wider the further they are away from the camera.
    But they are not - crazy hu? fuckin brains.

    brainz.gif
    all lines are parallel, everything stays the SAME size no matter how far it is.

    And this is why i asked what you expected the Ortho to look like. But thanks for not letting me help you understand it ;)

    And yeah this is sadly a drawback of the 2.5 faked perspective zbrush has, you will also have fun times with characters that are substantially longer than high. zBrush can#t handle it, because zBrush is no 3d tool.
  • cryrid
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    cryrid interpolator
    If you're having problems with a perspective view, post a shot of your perspective view enabled along with your Draw palette settings. 'Camera Angle of View' and 'Align to Object' can both have a big effect on the result and should be toyed with. You should be able to find a setting that feels right regardless of it being faked.
  • krisCrash
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    krisCrash polycounter lvl 9
    Neox, aaah, mind so blown. Sorry! Man, I tried to compare it with all sorts of straight lines but not like that.

    Cryrid:
    It feels like, if I try to focus on an area, then spin the camera around it, it rotates away massively. I've also been adjusting the AOV and such but I can't get a natural thing going.
    ZBRUSHMAN2.jpg
  • nyx702
    There are a couple things that can mess up the perspective. Scale is a big one. If your mesh is super tiny or super huge it can cause exaggerated camera distortion. I believe this can be mitigated some by turning off 'Align to Object'? I can't remember.

    Sometimes from appending tons of tools or using Goz alot a subtool will be off center or way out in space and I wont notice. That will causes some exaggerated distortion.

    ZB pivots around the last part of the mesh touched. So sometimes if you move from say the head to the feet I just mask or stroke a little part of the feet and undo to reset the camera pivot.
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