How come I cant fillet these edges?

The edges on the opening should fillet to .9" The thickness of the shell is over 2"RhinoHelp.3dm (1.1 MB)

Hello - it will work but you need to clean the model up a little - I’d first set the model tolerance to .001 feet. .01 is too large for fillets at .9" Make that top surface one face and then MergeAllFaces to clean up coplanar faces.[]=tolerance

RhinoHelp_PG.3dm (814.4 KB)


OffsetHelp.3dm (221.3 KB)

Thank you! Now I am trying to OffsetSrf this facing inwards like 1.5-2" but the tolerance change isnt helping.

Hello - here is looks like it works ok -