after exploring all options i am at a roadblock, how do i nice fill in these holesRIM.3dm (203.1 KB)
There’s no easy way to fill this. You needed to start this model with the center resolved first. Is it a domed, concave or planar center? There are some really good rim tutorials out there. https://www.youtube.com/watch?v=L0Dm4Jv3Nx0
As Jason said, this is pretty hard if unknown what the design intention is. I´ve just closed it using the information available.
- Created the red curves by extracting isopharms along U
- Created the light green blend curves between extracted curves
- The dark green surfaces can then be made with NetworkSrf
- Splitted the dark green surfaces in half along U by isopharm direction
- closed the remaining hole with the brown patch using tangency option
RIM_2.3dm (225.5 KB)
c.
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clement, this is what i want!!! you are a genius! i love this method! man you guys are the best!!!i would have never thought about this, thanks a million
There’s always the good cheat-
-Pascal
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How did zou accomplish this Pascal_
Hi Mitviz… it was at least partly in jest - just cover the difficult part with a detail… but, I made some simple loft surfaces and used MatchSrf as needed to get the visible parts cleanly aligned. File attached.
RIM_2_Cheat.3dm (266.7 KB)
-Pascal
Thanks Pascal, there is always some tricky way to do things in rhino, so sneaky:)
I keep having the same issues, i have another hole to close but i cant seem to figure it out, the center needs to be smooth like in the image but i cant seem to wrap my head around it in rhinoto cover.3dm (1.2 MB) 
Hi Mitviz- in this case, if I understand things, I think I’d make two little transition surfaces to a planar center - I don’t know if I made it the perfect size here - and then use some MatchSrf to get everything trued up and ArrayPolar.
to cover_PG.3dm (928.2 KB)
-Pascal
Thanks again Pascal! this is very close to what i am looking for, i would have never thought to do it this way