Cleaning Non-Planer Frustrations ?

[FalconCrest]

I've tried mesh clean up and adjusting the Length tolerance for Edges with zero length all that occurs are polygons on the mesh collapse; when what I want to do is simply keep the mesh the same but clean up the non-planar polygons. 

Note: Remove the DWG extension to make it a OBJ file.

[damaggio · Accepted solution]

I don't get it Falcon, your mesh looks perfect and does not contain non planar surfaces and goes to Sudv nicely, I only found 2 edge loops at the bottom that were raised to high showing shading issues, I just delete those 2 edges and did not affect the shape of the bottle.

[_sebastian_f]

damaggio is correct with the correct settings you can convert to sds. but like it was pointed out on polycount a week ago you have some zero length edges. (0.0002 and 0.0009 cm) which give you the trouble. the non-planar polys are still no probleme..

[FalconCrest]

When toggling on Display Non-Planar; Maya shows me the Non-Planar faces.

Polygons to SubDiv doesn't convert the mesh, but you say there are no problems and it does convert, but it doesn't convert for myself !

[FalconCrest]

I can't remove those zero length edges with mesh clean up at the values you show; or any other value I tested, all that results is triangles being inserted into the mesh which I don't want and the mesh still won't convert !

[_sebastian_f · Accepted solution]

ok last trial:

1. like damaggio said even without doing anything but the right settings for conversion you should be able to convert that mesh to sds.

2. i disagree with the mesh looking perfect. like damaggio pointed out you created coplanar faces resulting in shading issues. also there are some edgeloops moved off center which looks un-intentional. but thats more of an cosmetic issue.

3. non-planar faces in a mesh which gets subdivided are also not really an issue, don´t create problems for sds conversion and are sometimes impossible to prevent.

4. i don´t get how you don´t find these edges. if the automatic cleanup doesn´t help use it to select/find them and clean up by hand. thats 2 clicks. merge verts with low treshhold can work too. as said in point 1 it´s not necessary for conversion but bad modeling practice and maybe part of your "displacement spices" problem.

[FalconCrest]

Should being the operative word; but it's not, and yes it probably is related to my displacement spikes issue.  Regarding cleaning up by hand, I've deleted the non-planar faces and rebuilt them and they won't disappear.  

As you mentioned merge verticies with a low threshold, I've tried that as well by selecting all the vertices on the mesh followed by Merge Verticies options at a low threshold and the mesh continues not to convert ? 

It may be simple, how do you use Mesh Clean up to find Zero length edges which as I know are sometimes caused by very low extrusions ? 

Co-Planar faces and edges off center ?

[FalconCrest]

As well, deleting the non-planar faces and recreating them by the append polygon tool doesn't fix as well, when I make a sphere and convert to subd it works ?

[_sebastian_f]

Co-Planar faces and edges off center ?

just have a close look to your model...

As well, deleting the non-planar faces and recreating them by the append polygon tool doesn't fix as well, when I make a sphere and convert to subd it works ?

why are you still getting stuck there and trying to remove them?

read my last post again...

[FalconCrest]

Are those the Co-Planar you are referring too ?

Selecting all the vertices on the mesh then executing Merge Verticies Option with the following options the non-planar / zero point edges do not disappear ? 

[_sebastian_f]

first image: yes thats what im talking about. areas like this should be avoided.

to the second: works here but try to set the treshhold slightly higher than the points you whant to merge.

[FalconCrest]

I set the threshold to 0.00012 & 0.00016. In both attempt I can't convert the mesh ?

[FalconCrest]

Sebastian what are the steps you are doing that it works for you ?

[_sebastian_f]

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@_sebastian_f wrote:
1. like damaggio said even without doing anything but the right settings for conversion you should be able to convert that mesh to sds.

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could have taken you not even a minute to open the convert to subd option box and change one or both of the sliders to see what happens. maybe it´s enough to do like this if it´s for the displacement to poly conversion you where talking about somwhere else. but again i would rather create a clean mesh (maybe just redoing this one as its fairly quick and simple) and use iDisplace or depending on your maya version the texture deformer.

just as a side note 0.00012 & 0.00016 are smaller than 0.0002 and 0.0009 cm. so for sure you can not find the edges.

[FalconCrest]

Massive Brain fart. Silly, dumb me, I should have adjusted the slider, converting to Sds does work; although merging the vertices isn't. 

[_sebastian_f]

hard to say why it´s not working. is your treshold finally bigger than the distance between those verts?