Weirdness at Subdividing a Model

Forums Houdini Indie and Apprentice Weirdness at Subdividing a Model

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iam83: Member; 16 posts; Joined: Sept. 2015; Offline

Nov. 29, 2017 1:14 p.m.

Hi there,

Trying to learn modelling in Houdini, I've encountered a weird problem on the top edge of the model at subdividing my it.

What can be wrong with it?
Please see the attachments. Thank you.

Edited by iam83 - Nov. 29, 2017 13:15:02

Attachments:
modeling_forum.hipnc (235.3 KB)
normal.PNG (374.9 KB)
weird.PNG (469.3 KB)


robsdesign: Member; 240 posts; Joined: March 2015; Offline

Nov. 29, 2017 2:17 p.m.

Hi, there is an issue with your normals for the inside. If you reverse the normals for inside and (re)enable reverse winding on the polybridge, it should work. I've attached a hip file.

As a side note, you can quickly check normal direction by pressing (D) Display options>Optimize>Remove Backfaces. (This is sometimes easier to spot errors than using the Normals Visualisation)

Rob

Attachments:
modeling_forum_RS.hipnc (236.2 KB)


iam83: Member; 16 posts; Joined: Sept. 2015; Offline

Nov. 29, 2017 2:21 p.m.

Thank you, Rob! Yeah, I supposed that it could be normals but didn't know how to fix them, thank you for the tip as well, cheers


jsmack: Member; 8177 posts; Joined: Sept. 2011; Offline

Dec. 1, 2017 3:37 a.m.

You can use the facet, clean, or polydoctor tools to fix winding problems by orienting all the polygons the same direction.

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