Rebuilding patched and trimmed open surface

I created the attached original surface geometry through a series of lofted curves with the result being an open surface. I have since needed to make more detailed edits in select locations (the colored zones) to define fabrication joints and to blend surfaces. As a result I now have a fairly patchwork surface and I would like to rebuild the entire thing into one surface again, but I can’t merge trimmed surface edges and rebuild. Just not sure what the best process would be here.

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Hi Randy - why? Does this all join up?


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Yes. The geometry needs to be imported back into Revit for documentation so I need a clean model to export/import and I also need to send the geometry to the fabricator in a format that is easy for them to work with and concerned that a model with hundreds of broken faces (this is just one of many similar forms) will be complicated to resolve on their end.

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Hi Randy - post the file, or send to with a link back here in your comments, if the file is confidential.


Ah yes the proverbial trimmed edge problem lol. You use ‘network’ techniques yet? I’ll check it out brb.

nvrmnd no file lol.

you lost me at ‘Revit’ haha jk.

So, normally when I want to do the “impossible” type of surface networks, I will keep the ‘original’ surface data as a way to pull back any deviations for the new networks to maintain the same shape – if any deviations aren’t acceptable etc.

And it’s pretty amazing what can be done with isocurve flow compositions using this method.

This is a recent example where I tried to demonstrate this method:

It was a pretty demanding piece of geometry so the results weren’t perfect, although I could probably make revisions.