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Thread: Methods for cutting into Sub-D Surfaces...

  1. #1
    3D Junkie Serling's Avatar
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    Methods for cutting into Sub-D Surfaces...

    I'm currently modeling a Jack-O-Lantern for a project but am running into trouble: every time I try to "carve" (Boolean) holes into the subpatched mesh, things get real ugly (N-gon issues arise).

    Even when I freeze the mesh before a Boolean, I still get odd missing and overhanging polys where certain edges are created. It's driving me crazy.

    Does anyone know of a good tutorial for cutting complex shapes into Sub-patched meshes?

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  2. #2
    Super Member nickdigital's Avatar
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    How dense is your frozen mesh? Also try tripling it before doing a boolean.
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  3. #3
    3D Junkie Serling's Avatar
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    Quote Originally Posted by nickdigital View Post
    How dense is your frozen mesh? Also try tripling it before doing a boolean.
    Not to dense (level 2 Sub-D). I was trying to keep the poly count low. Will try the triple trick. That sounds promising.
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  4. #4
    3D Junkie Serling's Avatar
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    Sub-patched and frozen at level 4 then tripled. This is the result I keep getting. Is there any program out there that does booleans well?

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    Super Member Kryslin's Avatar
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    Hmm, I would use solid drill to stencil the design into the unsubd'd cage, inset it slightly, and bridge it, then subD it.

    If you have LWCAD, you could slice the design into the cage using the Line and Curve Booleans...

    I just went through something similar, trying to cut cockpit glass into a subD aircraft hull.
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  6. #6
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    Quote Originally Posted by Serling View Post
    Is there any program out there that does booleans well?
    No...

    Nobody uses boolean while organic modeling..

  7. #7
    Super Member nickdigital's Avatar
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    Yeah I normally do what kryslin does if a normal boolean doesn't work.
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  8. #8
    Robert Ireland bobakabob's Avatar
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    This Trueart plugin looks like it would help http://www.trueart.eu/?URIType=Direc...-Ins/EasySplit
    Otherwise subdivide the object with Metaform to give yourself more polys to play with, delete polys for eyes and mouth, pull vertices into place and use Thickener. Booleans tend to be too unpredictable.
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  9. #9
    3D Junkie Serling's Avatar
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    I gave up on trying to cut any holes into the mesh and, instead, stenciled (drilled) some background polys onto the mesh, selected all the polys inside the stencils, then used the extender + scale + move tools to create this result.

    I still have to do some surfacing, but this will work given the amount of time it will be on the screen (about 1 second.)

    Update with some surfacing and lighting...
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    Last edited by Serling; 10-07-2012 at 02:26 AM.
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  10. #10
    Yeah Booleans are filthiest operations with Polygonal modeling. Go to NURBS package, drill it, add fillet on edges and bring back polys for rendering .

    Or spend half day doing fixes for Subds mesh after boolen ..
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  11. #11
    3D Junkie Serling's Avatar
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    And here is the last bit of surfacing and lighting on it.

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  12. #12
    Hmm, to much light/glow inside for my taste. It should have candle light inside so this is way too bright. But texture on pumpkin is quite good .
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  13. #13
    3D Junkie Serling's Avatar
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    Quote Originally Posted by Lewis View Post
    Hmm, to much light/glow inside for my taste. It should have candle light inside so this is way too bright. But texture on pumpkin is quite good .
    That's why I was trying to cut the polys out instead of just extruding them inward: I wanted the kind of lighting falloff you'd get with a candle (light source inside it). But I couldn't cut out the polys on a subd surface and get it to look like this, so I took this instead.

    If the boss approves it, it will be on screen no more than one second anyway (to be used as a keyable transition over video.)

    And thank you for the good word on the surfacing.
    Last edited by Serling; 10-07-2012 at 03:11 AM.
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  14. #14
    J.D.Lowe ShadowMystic's Avatar
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    Quote Originally Posted by Serling View Post
    That's why I was trying to cut the polys out instead of just extruding them inward: I wanted the kind of lighting falloff you'd get with a candle (light source inside it). But I couldn't cut out the polys on a subd surface and get it to look like this, so I took this instead.

    If the boss approves it, it will be on screen no more than one second anyway (to be used as a keyable transition over video.)

    And thank you for the good word on the surfacing.
    I disagree on the surfacing comment... The bump is far is too pronounced, and the internals of a pumpkin are a translucent, fibrous, tissue that give a jack-o-lantern their signature eerie glow. Also I'd cool the light into a bluish 'moonlight' hue for contrast.

  15. #15
    Super Member XswampyX's Avatar
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    I have to agree. Try the sigma2 node for a start. Here's a quick test. Notice how the stalk looks a different colour, even though it has the same surface. That's down to lighting.

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