Hi All,
I’ve attached an image that shows what I call fracture lines along surfaces joined after conversion from SubD to NURBS. These little hairline fractures appear. I have the mesh resolution pegged out so that’s not the issue. Has anyone else run into this issue. Thanks in advance…
Jim
My bad I can’t see anything there, to me is just fully black.
You should upload the 3D file to let everyone understand better.
If you enlarge the image you can clearly see the white hairlines that the green arrows are pointing to…at least on my screen…you have to enlarge the image…thanks for the feedback however.
Those “fractures” appear to correspond to the nurbs patches.
How are you rendering this?
Hi, thanks for getting back. I have the mesh at full resolution and when I render with the latest Rhino render at full resolution and fine detail in rendering mode, I get this. And yes, you are correct, these “fracture lines” appear at the Nurbs surface junctures after converting from SubD to Nurbs.
That being said, I can take care of them post process in PS, but, this is something that I thought I’d bring up to the community and the folks at McNeel… It definitely is not a show stopper.
Thanks for responding. Jim
If you can share the file with us for investigation that’d be great. If you don’t want to share it publicly use our upload tool - my email address is prefilled, but please paste a link to this topic in the comments section so I know what it relates to. I get notified automatically when the upload is complete.
May it be simply because the SRF patches weren’t joined?
Just starting from the most obvious.
I sent the file to you and you can see that all the NURBs surfaces are joined…the only thing I can think of is upping the tolerances…I’ll try that.
It really looks like the rendering meshes were too coarse and the SRF edges get unjoined vertex.
Did you changed the mesh option to detailed?
Apologize me but I’m from my tablet and can’t open the file.
I saw the notification, I replied to you as only the screenshot you sent came in (twice).
Did you get the actual .3dm file, I can send it, but, even zipped, it’s over 20mb
No, please re-upload by clicking again on the upload link. I think that if you uploaded your file, then went back in navigation history to upload your screenshot it overwrote the ZIP file. Just re-upload and I’ll have a look. Even 100MB should not be a problem.
I would run _ShowEdges and look for naked edges for the object. If there are naked edges I would use _JoinEdge.
A quick workaround, which doesn’t fix the reason for the bad effect, could be to set a much finer render mesh.
@Jim_Girard I received your file. I think you need to uncheck the Jagged Seams option in meshing settings.
That said I think the patches don’t align up nicely. I have not enough surfacing prowess to be able to tell what exactly is wrong, but it just looks a bit weird in places. I’ll ask @theoutside to have a look at your file to see why the patches behave as they do.
it’s all render mesh my dude…
uncheck jagged edges and refine mesh and it looks lovely-
if that does not work on your end go with some settings like this- it’s overkill but looks nice-
Thanks Kyle, I’ll check the settings out…i appreciate the help…have a great weekend…Jim
It worked, jagged edges were the culprit. Still getting used to Rhino 8. You know Kyle, a couple of things I miss from TSplines
Being able to conform a round opening on the sub d to a circle curve like TSplines used to do…see illustration below.
Being able to sub divide part of the sub D object more than another part of the sub d. TSplines would let you define a big small areas due to this capability.
Is this something that the McNeel team would look at as an improvement to an already fantastic program? It’s on my wish list… ha ha.
Again, thanks for your help on this…getting rid of jagged edges did the trick…Have a great weekend Kyle.
Jim
you can, use align and the “to curve” option.
Only limitation is it aligns the verts from the box mode, not the smooth mode.
you can align the verts or an edge loop-
you will need to do some slight adjusting to compensate for the box/smooth mode issue but it’ll get you close enough to edit it further as needed.
as far as local refinement, that’s a tsplines thing and is what they made their money on.
that said, proper sub topology should be able to get you wherever you need to go.
Thanks Kyle…I’ll try it out…mind you, I’m not complaining, I am blown away by Rhino 8 on the Mac Platform vs. Rhino 5 on the Windows platform… I had no idea Rhino 8 had come so far. The rendering is flawless and Sub D is sweet…I’m so glad I finally made the jump
That being said, your tutorials and demos were so helpful. I especially like how you don’t pre rehearse your tutorials, but by encountering problems in the demo, you present it like we would experience it… by solving problems to get the effect we want. I do appreciate them a lot.
Also, thanks for getting back to me on these questions…helps a lot.
Jim.
