Surface generation in Rhinoceros

Hi all,

When I use solid tools to create a sphere or paraboloid in Rhino, a dark black line appears automatically (see Image 1). When I try to split the sphere or paraboloid surface using a curve (see Image 2), two different surfaces appear because of the dark black line (see Image 3). Does anyone know how to get rid of this line?

Best regards,

Sushant

Replies to This Discussion

Permalink Reply by Danny Boyes on June 12, 2014 at 5:57am

This is the Seam of the Surface. The 2 edges that meet up to make it a closed surface

If you have an area you wish to split out from the surface that spans the Seam you can use the Rhino Command SrfSeam to move the seam out of the way.

Permalink Reply by Danny Boyes on June 12, 2014 at 9:08am

If you want to disguise it so that the Seam is not so obvious in the viewport the you can go to the Display Properties and reduce the size of the Surface Edges Thickness to be the same as the isocurves.

Is there is a way to completely hide the seam or delete it?

What you are asking is impossible. Think of a Sphere in Rhino as being a Surface that has been Bent around to form a cylinder and then pinched top and bottom to close the openings.

Therefore the surface still has four edges except that the top and bottom have been collapsed to form a point and the two sides are the same. It's the two sides that form the seam.

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