Hi there, I’m trying to merge 3 surfaces into one. They share the same edge. Brep join not helpfull. [image] Any component for this ? Or will have to deconstruct them in order to rebuild one srf? Thanks, CC

[image] Charles Collin: So I have to use a script of someone else does to “bridge the gap”. I might have to dig into it further to see why the solution end up to be un-tight. Ah - got it. Interesting - I did imagine the connecting lines forming the bridge were some sort of blending or bezier…

Simple answer: The surfaces do not share edges, not exactly. Here’s a closeup of the top end of the join between surfaces 2 and 3. I have extracted the edge curves and moved them to one side for clarity. [image] The trimmed edge of surface 3 (with many control points) does not match the much simp…

MergeFaces2_cheat_jvs.gh (101.2 KB)

thanks both for point this out. I still clueless tho on why this is happening the way I built these shapes… curious. @Jakob_v_Schirmeister thanks for the script, it work just fine. I just want to make sure to understand it properly: the tolerence py component is adjusting the tolerence of the whole…

Looks like your inputs are on different branches. Flatten the input to your join component or simplify the input components. [image]

no . in most cases you should not do that. the script sets the tolerance of the current rhinofile. but in most cases we need to deliver precise data. so we need to model precise (change your geometry!) the script proves here that the precision is the problem. open an new rhinofile or set the prop…

@Tom_Newsom I’d like to, but they are the result of a much bigger script. The trimmed cones are connected through a blend surface GH component (which has been made roughly).. I think this is the problem, but I have no alternative for this now.. I will try to rebuild the buttom and top curves and jo…

[image] Charles Collin: not a good idea to mess with this. Still I’m tempted to do so, because at 0.12 tolerance it works… Given these objects come from a bigger script, I’ll skip questions/suggestions about how this bridge surface is initiated. After checking a few options with what you hav…

The solution is clever @René_Corella ! rebuilding the surface to make it tight. And of course the main issue is how blend between surface been made (I put it in this GH file below). Actually there is no script in GH to blend surface as powerfull as it is in Rhino itself. I think its on the roadmap……

@René_Corella why I didn’t thought of this earlier ..-.-’ think I was to close into it to see it ahah. [image] it does the trick perfectly without buttering to join all these srfs. Thanks very much, CC

Merge surfaces (trim and untrim) sharing same edge

Grasshopper

Tom_Newsom (Tom Newsom) August 13, 2025, 5:53pm 10

Also this looks like a pretty simple surface. Can you not generate the upper and lower edges as single curves and make a Ruled surface between them?

From trimmed surface to untrimmed surface

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Merge surfaces (trim and untrim) sharing same edge

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