Maya for 3D Printing - Rapid Prototyping
In this course we're going to look at something a little different, creating technically accurate 3D printed parts.
# 1 25-01-2006 , 01:55 PM
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SubD to Polygon conversion problem

Hi

I am having trouble converting a subd object to a polygon object, I get these strange black faces around certain edges in the viewports as well as when I render.

user added image

Any suggestions as to how I can fix this problem?


Thanks
/BlueShift

# 2 25-01-2006 , 02:22 PM
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maybe left over vertices.

# 3 25-01-2006 , 04:41 PM
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try hitting the "3" keyuser added image to show maximum detail.

user added image

# 4 25-01-2006 , 06:52 PM
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Those objects were converted from subd to polygon.

Using the mesh smoothing options only improves the quality of subd or nurbs meshes - I think, because it didn't help.

No left over vertex's either.


/BlueShift

# 5 25-01-2006 , 08:04 PM
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if these shots are of a ploy mesh u need to get rid of the 5 sided polys
look at the pic i added to see where to use the split poly tool

hope this helps but make sure that wen u use the split tool u make sure that the new verts are merged

also make sure u use the split poly tool on the back of the model to get rid of ne 5 sided faces

this should fix it if it is a poly mesh

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Now at SMU doing BSc 3D Computer Animation so its hard to get on here
My wire render tut https://forum.simplymaya.com/showthre...threadid=20973

Last edited by pbman; 25-01-2006 at 08:10 PM.
# 6 25-01-2006 , 08:21 PM
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i think its maybe something to do with the normals play with the normals options cause im not sure either mike or some one will know.

# 7 26-01-2006 , 12:11 AM
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As far as I know it's an artifact of the conversion from sub-d to poly's. If you select the object in question and then go to Edit Polygons- Normals- soften/harden----open the option box and move the slider to all harden and the select apply, that should take care of the problem.

# 8 26-01-2006 , 12:46 PM
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Thanks guys, soften/harden polys does the trick

Be warned though: you have to select the edges where these artifacts occur and apply varying degrees of smoothing to them to get rid of artifacts.

Applying Harden to a large rounded surface will produce faceting along edges.


/BlueShift

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