View Full Version : 4 side polygons

09 September 2003, 02:23 PM
Hey 3D guys, specially modelers. I have a little question.

"How important is to keep all polygons with 4 sides if the modeler intend to use poly smoth node?"

I start to think about that when I realized that I don´t like to work with subdivision. I know the process with subdivision is faster with no extraordinary points, but I don´t know about poly smoth algorithm.

I keep this habit mostly because I have the control of the edge flow. But some times, this can be very annoying. Any body can give me some light on this matter? Thank´s in advance.

Guilherme Lopes

09 September 2003, 01:01 PM
Wow! Forty three guys visity this thread and it has no answer at all! Is that question stupid? If so, one let me know, please.

Any way, I used Maya terminology but the question is related to modelling tecniques. I´d really appreciate if one wants to shares its ideas.

Guilherme Lopes

09 September 2003, 09:52 PM
Make a search in the forum, this topic has been discussed a million times

09 September 2003, 02:57 PM
Thanks for the tip ThirdEye_01. I had already made this. I spent a couple of hours looking for key words like: poly, smoth, subdivision, sides, techinique and so on. Unfortunatly I dind find anything specifically related to this issue.

I´d like to remind every body that I know the restrictions for the use of n-side polys in subdivision. I still trying to bring some light to this matter, any reply would be valious.

Guilherme Lopes

09 September 2003, 03:17 PM
I just saw, luck I guess, this thread Topology research ( There, a reply call my attention.

Originally posted by Laa-Yosh
Regarding 3 and 5-sided polys, they will be converted to 3 and 5 quad faces at the first level of subdivision where you can easily smooth them out with hierarchical editing. But with straight polysmooth / nonhierarchical subdiv conversion we have to make sure that these faces will stay smooth, even during animation.

It´s good reason, but I don´t know if there´s a increasing in the amouth of process time. It happens in subdivision! Any body have other informations?

Guilherme Lopes

09 September 2003, 10:43 PM

I hope this helps :)

09 September 2003, 11:06 PM
From what I understand, the issue is that most subdivision
algorithms favor 3 and 4 sided polys, plus 4-sided polys can be
non-planer, while 3-sided ones cannot.

That means that you can think of quads as bendable.

I'm not sure about this, I'll have to do some digging at some
point when I have more time.

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