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 From:  Michael Gibson
4453.7 In reply to 4453.5 
But also you mention being worried about polygon flow - what is it that you are planning on doing with the mesh that you are specifically concerned about that?

If you need a particular kind of polygon flow because you plan on doing sub-d smoothing, you really aren't going to get that kind of a result from MoI's export. MoI's export is more oriented towards making an efficient polygon count with a lightweight wireframe using n-gons. That's a very different kind of mesh structure than a sub-d friendly one which requires a lot more tiling of large areas into numerous quads instead of using something like one big n-gon for a large flat face.

See these previous forum posts for some additional explanation:

http://moi3d.com/forum/index.php?webtag=MOI&msg=3628.132
http://moi3d.com/forum/index.php?webtag=MOI&msg=4096.18
http://moi3d.com/forum/index.php?webtag=MOI&msg=3488.3
http://moi3d.com/forum/index.php?webtag=MOI&msg=3196.11

http://moi3d.com/forum/index.php?webtag=MOI&msg=1536.30

- Michael
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 From:  mash (MASH3D)
4453.8 In reply to 4453.7 
I have take some IGS files and convert them polygon models, proably sub-d at that.
I know MOI won't give me a perfect Mesh for that sort of thing. But if I can do anything to reduce my work on the polygon side of the pipeline it helps. Worse case I can do a retopo in 3d coat.

I'm also starting to have to reproduce items, cars etc, that were clearly made in a nurbs package.
But having to build them with sub division modelling is a pain.
Using MOI just to produce a fast low res model can be a big help on the poly modeling side.

EDITED: 28 Aug 2011 by MASH3D

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 From:  Michael Gibson
4453.9 In reply to 4453.8 
Hi mash - yeah basically MoI (with the n-gon option active) builds a mesh that resembles and follows the same topology as the NURBS object - things like one n-gon face for one trimmed planar NURBS surface, etc...

That's a nice clean structure in a lot of ways, like not a lot of extra wires but it's just a generally different kind of structure than what you'll need for sub-d except in particular special cases like with untrimmed surfaces.

But that's great that you've got 3d-coat and can use that for retopo if needed.

I just wanted to clarify that - it's kind of a frequent thing that people see Moi's structured n-gon output and seem to automatically jump to the conclusion that a clean looking wireframe and organized looking topology equates to sub-d friendly topology, when that's not necessarily the case.


If you are looking to produce a rendering of your models, you can just render MoI's output directly - it includes vertex normals with the output which helps things look smooth in the rendering without having to apply any sub-d smoothing on it at all.

- Michael
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