Hi Everyone,
I have an object, similar to an acoustic guitar bridge where I need to create clean holes like pipes passed through the object. I was able to successfully do this using RoundHole command, unfortunately, it automatically converted my SubD into regular mesh and converting it back to SubD will not yield a nice model like before.
I appreciate any workaround advice you can give. Thanks!
6 - 8 sided holes are quite close to circular…
Also for this problem you may want to post your Rhino file containing the relevant geometry.
TEST HOLES.3dm (328.7 KB)
Here’s the file, the hole marker are in place for reference. I’m thinking of Boolean functions but not sure if available in SubD. Thanks for the help!
Do you desperately need this as a SubD?
Holes in SubD geometry can be challenging…
It really depends on what you want to do with this shape later on. If you are not going to manipulate the shape, I’d simply boolean the holes.
One way of doing this is by converting the SubD to a Polysurface and then Quadremesh with guide curves. I gave it a try with fillets on thehole edges first which didn’t lead to a good result and then only added guide curves.
TEST HOLES.3dm (10.2 MB)
Not at all, I just find SubD convenient at the moment /this task and I’m afraid I won’t be able to modify or revise anything as fluid as before if the object gets converted. Also, I never had major issues exporting to sketchup. Sometimes artifacts, edge holes, etc. in general looks okay.
But in the end whatever works best, I will adapt. Will just save a backup first of orig subD then before converting. Thanks for your time sharing this knowledge, I will have a look.
The holes on your sample in the second one (the middle) is what I’m aiming for, very sharp crisp edge. Is this Boolean operation?
The middle object is a polysurface with holes subtracted. It really depends on what you are after and how you want to edit. I usually try take benefit of the modeling technique (Nurbs / SubD / Mesh) and only very rarely model an object as a pure SubD. I’m not saying it is impossible but in many situations it does not make sense to stick with SubD especially when you want sharp edges and perfectly round holes.
Attached is the same simple SubD example I posted in your other topic. The example has more or less parallel faces. Your geometry is a tiny bit more complicated. How are you planning on producing this part?
Subd_with_hole.3dm (250.4 KB)
I would use ToNURBS on the SubD prior to adding circular holes to make it as few surfaces as possible. Save a copy of the SubD and a copy of the cutting objects in case you have to make a change and redo it later.
Thank you all, very helpful!
