Forums Houdini Indie and Apprentice How to create a geometry with a hole?

How to create a geometry with a hole?

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ForMiSoft
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Hi,
I have two extruded grids:
1. 2 columns, 2 rows, size 3x3
2. 2 columns, 2 rows, size 1x1

Then I use Boolean to substract smaller one from larger one:


The result is this:


The same result is when using Box nodes.

Is there any way how to create this geometry without that seam?
It don't looks good when rendered.
Edited by ForMiSoft - Nov. 12, 2018 15:51:22
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goldfarb
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try appending a Normals node
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tamte
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that seam is necessary as otherwise you can't define single polygon with a hole as a continuous closed curve
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ForMiSoft
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tamte
that seam is necessary as otherwise you can't define single polygon with a hole as a continuous closed curve

OK, I understand that. But is there any trick how to avoid seams to be visible in rendered output?



In image above seams are even more pronounced because they was a part of PolyBevel node.

Edited by ForMiSoft - Nov. 12, 2018 16:15:46
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tamte
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just don't include that edge when polybevelling
PolyBevel has a checkbox Ignore Flat Edges, see if it helps

EDIT: actually effect like you see after polybevel would happen only if you have faces coming down the bridge edge, that will not happen just from the boolean setup as you were showing before
Edited by tamte - Nov. 12, 2018 17:13:59
Tomas Slancik
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ForMiSoft
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tamte
effect like you see after polybevel would happen only if you have faces coming down the bridge edge

I'm a total beginner with Houdini. I'm unable to polyextrude that curve without seam faces coming down. I'm sending the HIP file as an attachment. Can you or someone please help me to correct it? It does not matter how that geometry of letter o will be created. It is only necessary that seam will not be seen on the render.

Image Not Found
Edited by ForMiSoft - Nov. 13, 2018 01:58:14

Attachments:
ForMiSoft_logo.hipnc (865.5 KB)

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Midphase
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Just add a Fuse Node after the Curve Nodes in the “O”'s and that should do the trick!

Attachments:
ForMiSoft_logo_FIX.hipnc (877.0 KB)

>>Kays
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ForMiSoft
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Midphase
Just add a Fuse Node after the Curve Nodes in the “O”'s and that should do the trick!

Wow! Thank you very much. I'ts perfect now.

Edited by ForMiSoft - Nov. 13, 2018 02:46:54
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