Hi, can anyone help me? I’ve got a bit of an interesting (to me!) surface model I’m working on. I’m trying to run a fillet all the way across an edge but at one point it is always flipping and I can’t figure out how to make it stop?
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It’s difficult to help with just a screenshot. You may want to upload a Rhino file with the relevant geometry…
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my screenshot-guess: the surfaces are close to tangential at the “flipping point”. you can use _edgeContinuity to verify this.
my forum guess: @theoutside will recommend Pipe-Trim…
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Yep- that’s a perfect use case for pipe trim.
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still waiting for the pipe trim eto framework 
Hi Kyle- please post a file with that object.
-Pascal
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The only thing visible from the screenshot is that you have completely overbuild your surfaces.
These are very simple surfaces and they should be build with much fewer control points.
Furthermore the triangular surface that finishes in a singularity (stacked control points) is bound to guarantee problems further down the modeling pipeline, especially with filletting.
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I did consider the 3 sided face was going to be an issue. My plan on monday is to radius the point at the top and make a curve either side of the radius.
I did have a go at pipe trim, works well! Coming from Inventor / Fusion I’m learning more and more so how powerful Rhino is… but also how inexperienced I really am!