My approach would be:
1. single surface based on input curves (patch?)
2. Splitting it with input curves
3. Extracting edges from resulting surfaces
4. Removing outside element
Not very clever but it may work."
"I'm amazed, (it is such a big step forward) and at the same time I have a request.
Is it possible to introduce a scalpel tool that, by drawing a line on a canvas, cuts all the intersected connections? It is a quick way of removal unwanted…"
It looks like a hardware problem. Installing Rhino was just a coincidence. Just to make sure it is not rhino related try to manually close all running McNeel applications (Rhino sessions + automatic updates) and then check again if blue…"