# SUBD Plastic Chair

**URL:** <https://discourse.mcneel.com/t/subd-plastic-chair/126136>\
**Category:** Rhino for Windows\
**Tags:** windows, modeling, subd\
**Created:** [June 17, 2021, 2:58pm UTC](https://discourse.mcneel.com/t/subd-plastic-chair/126136 "2021-06-17T14:58:44Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sena.ustol](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/sena.ustol/32/308304_2.png) [@sena.ustol](https://discourse.mcneel.com/u/sena.ustol)\
**Post date:** [June 17, 2021, 2:58pm UTC](https://discourse.mcneel.com/t/subd-plastic-chair/126136/1 "2021-06-17T14:58:45Z")

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Hello people!

So this newbie is having a problem about modelling a plastic chair.

Inner surface needs to be smooth, just outer surface has the wave graving.  
For this model first I draw the outer wavy section then loft it around the seat curve, then I turned that polygon into subd.

Also I had the angle of the inner surface with the same method. Than I bridged them.

But here comes the problem:

If I leave it as a solid subd, I am having much trouble with doing the flanges (on the left).

If I do the flanges on the outer surface than I need to fill the gap between those two. But I cant use /bridge, or /stitch for that.

What should I do? Maybe my method is completely wrong haha.

Thank you in advance

 ![1](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/0/2/d/02d1d0819b4501542fa40bb9bd65341426f7fd1b.png)

 ![2.PNG](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/2/4/2/2424868ba179c577033312b209c4074d6a711742.jpeg)

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<div class="post-metadata">

**Author:** ![theoutside](https://sea3.discourse-cdn.com/mcneel/user_avatar/discourse.mcneel.com/theoutside/32/473900_2.png) [@theoutside](https://discourse.mcneel.com/u/theoutside)\
**Post date:** [October 1, 2021, 10:33pm UTC](https://discourse.mcneel.com/t/subd-plastic-chair/126136/2 "2021-10-01T22:33:03Z")

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do the flanges have to be subd? if not you can get the shapes you want then simply convert to nurbs, then close the ends up with a simple trimmed planar surface?

that way you could have much simpler topology inside the chair which will likely make it smoother.

remember, you need only 3 edges to make a corner-

[![](https://global.discourse-cdn.com/mcneel/uploads/default/original/4X/1/0/c/10c7f31de7e10649063e3199b22d1d5556d336cf.jpeg "Rhino 7- SubD, Rule of Three") ](https://www.youtube.com/watch?v=1XNr2HBpGdU)