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munkittrick

Upgraded to r20...tool issues...

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Hello all!

 I've got a rigged model set to animate that requires a bit more subdivision in a specific area (namely the hands) to smooth out aberrations in the mesh when bending a joint. In r18 (my previous version before the update), I could select the knife tool and cut on BOTH hands of a symmetrical body, but it appears to no longer exist in r20. If that is the case, how would I go about creating a cut on one hand and have it apply to both hands of the symmetrical object?

THANKS!

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AFAIK, there is no difference in the knife tools between R18 and R20. If your mesh is in a symmetry cutting one side should also cut the other. If that isn't the case, we'll be needing the scene file to find out why...

 

I bet it's the rigging that's the problem though. You should only ever rig a mesh when the model is complete. Changing topo afterwards is usually a very bad idea and will probably involve a re-bind to take into account the new point count and order.

 

CBR

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  • Unfortunately, the scene file is nearly 450MB with the mesh as it is.

     Basically, what I could do in r18, I cannot in r20. I selected the polygons that require a cut to effectively subdivide the polygons within the hands of a character. When I select the "loop or path cut" tool, I can slice one hand along a path within the selected polys, but the cut doesn't appear on the mirrored portion of the model. This is not a symmetry object created with half of an object with the symmetry modifier, but instead and model that was build with symmetry and optimized to create a singular model.

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    Posted (edited)
    8 minutes ago, munkittrick said:

    I can slice one hand along a path within the selected polys, but the cut doesn't appear on the mirrored portion of the model.

    No, if it's no longer in a symmetry object, that won't work, and I am going to venture never has ! I'd be very interested to see a demo of that working in R18...

    Once an object loses its symmetry, how can the knife tool, which has no memory of the history of an object know what the other side is ?

     

    But you should be able to tick 'reuse cuts' to be able to do an identical cut on the other side manually...

     

    CBR

    Edited by Cerbera
    added info... pls refresh page

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  • So, the loop cut tool in r18 wasn't supposed to do what it did? I'll look through my  literature, but I'm positive that it worked with both the sculpting knife and the loop knife tool. I'm from the zBrush world, but have come to love C4D for it's mograph and animation tools. The inability to slice a perfectly symmetrical model created from a symmetry object to the mirrored portion of that model, but then optimized to make a unified object...the cut tool doesn't appear to be capable of the very thing that I had come to depend on.

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    Oh it will work with the sculpting symmetry because that's its own independent thing, but of course the knife tool there does something very different...

    I've been using Cinema since R10 and I swear I can't remember any of our poly knife tools ever being able to symmetrically cut a non-symmetry object.

    This is (partly) why order of operation is so important in C4D character work - modelling should be final and nailed down before any rigging starts.

     

    CBR

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  • Believe me, I've got the order of operations down, but my client couldn't care less. For some reason, the knife tool in the sculpt mode is NOW cutting loops symmetrically. I might need to reinstall the update for r20, because I'm getting all kinds of weird quirks.

    Thanks so much!

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    Now you're REALLY confusing me - the Sculpt Knife tool can't alter polycount or add new loops at all - it just creases / alters the topo that is already there.

    Trying to think what else you could mean...

     

    CBR

     

     

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    There is a function in the Loop Cut tool 'Symmetrical Cut', but that is symmetry within a polygon loop, not across a model.

     

    Could we at least see a screenshot of this working for you, so we can see what tool you have active ?!

     

    CBR

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  • I meant the geometry loop knife, NOT in sculpt mode. Sorry. It's working fine again after a reinstall of the r20 update. Basically, I select the geometry that I want to subdivide, choose the loop/path cut knife, set it for selected only and cut the polys in loops. The cuts appear on both sides now. Before, when I would select the polys and use the subdivide tool, the rig was going to hell because there was no mapping for the new polys, but with the loop tool, it simply cuts the geometry in half and maintains the weighting. I've got to get back to it now. Thanks so much!

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    Well, you say it's working, so I have obviously misunderstood something you are doing at a very base level. I wish I knew what it was !

     

    CBR

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  • Speaking with the client at the moment. MORE effin' changes!!! I'll try to capture a video of the tool in action and post it tomorrow.

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