SimplyMaya Forums

Welcome to the forum, feel free to ask questions here.

Home / forum / Modeling / Modeling / Seams on Nurbs
Register FAQ Members List Calendar Mark Forums Read

New Thread
 
Thread Tools
Old 12-10-2010, 07:44 PM   #1
tecboy
Registered User
 
Join Date: Sep 2006
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Default Seams on Nurbs

There are subtle seems on Nurbs object. Does anyone knows how I can fix this?
Attached Thumbnails
Click image for larger version

Name:	seam.jpg
Views:	315
Size:	21.0 KB
ID:	44924  
tecboy is offline   Reply With Quote
Old 13-10-2010, 04:04 AM   #2
hamidz90
Registered User
 
hamidz90's Avatar
 
Join Date: May 2010
Posts: 37
Thanks: 1
Thanked 10 Times in 10 Posts
Default

im not really sure but i think if you set your nurbs tessellation higher it should fix it, you can do this by selecting your nurbs object.....going in the rendering section then click on the menu called Render and then on set nurbs tesselation
hamidz90 is offline   Reply With Quote
Old 13-10-2010, 10:01 PM   #3
tecboy
Registered User
 
Join Date: Sep 2006
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally posted by hamidz90
im not really sure but i think if you set your nurbs tessellation higher it should fix it, you can do this by selecting your nurbs object.....going in the rendering section then click on the menu called Render and then on set nurbs tesselation
Thanks, I'll try that.
tecboy is offline   Reply With Quote
Old 10-12-2010, 08:01 AM   #4
ctbram
Moderator
 
ctbram's Avatar
 
Join Date: Jan 2004
Location: Michigan, USA
Posts: 2,996
Thanks: 42
Thanked 582 Times in 532 Posts
Default

Increasing tessellation will really not fix the seam issue. Seams between adjacent NURBs surfaces are caused by non-parallel surface tangents along the seam.

There are a number of ways to correct this. The easiest is to attach the two surfaces using the "blend" and 50% settings and then detach them. This will force the two surfaces to be tangent at the edges where they meet. Alternatively, you can select the two hulls that run parallel on both surfaces, closest to the seam, and make them all coplanar.

There are other solutions as well at some point I will make a small video tutorial to demonstrate in the mean time I will grab a couple screen shots to demonstrate the cause and one solution.


Here is the first image. It demonstrates what makes a seam invisible == crease less is TANGENCY.




This next image shows how breaking TANGENCY also creates a seam...



And here is one solution (attach with blend and then detach)...



Just a final note. Once you have tangency at two edges then as long as you keep the four hulls closest to the edge (two on each surface) planar you can do anything you want to all the OTHER cv's and hulls and there will never be a visible seam.
__________________
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675

Last edited by ctbram : 10-12-2010 at 09:42 AM.
ctbram is offline   Reply With Quote
New Thread

« Previous Thread | Next Thread »

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

1 Month

$34

Month-to-month billing
$34/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
 
 

3 months

$87

Billing every 3 months
$29/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $5 per month or $15 in total compared to monthly billing with this package.

12 months

$288

Billing every 12 months
$24/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $10 per month or $120 in total compared to monthly billing with this package.

Your plan will automatically renew. You can cancel at any time via your PayPal account to avoid being charged again.

You can view the FAQ on our video plans here. You can contact us directly here. By clicking one of the buttons above, you agree to our Terms and Privacy Policy.