How do I cap the area with the arrows?
CapIT.3dm (755.2 KB)
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you have a bit of a mess there with the model consisting mostly of mesh and a few tiny nurbs in between. i assume you are going to work further in mesh because that is the most there is available.
select all surfaces with SelSrf then use the command Mesh. hide als surfaces and join the remaining mesh together. then create one Meshplane and pull it from edge to edge over the entire bottom.
lastly use the command MeshSplit and remove all the not needed parts.
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I know. I wanted a solid. It’s not my drawing but was given to me. It was generated in Fusion 360. I was just trying to modify it. I still wasn’t able to fix it via your suggestions, but thanks anyway.
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See if the file can be exported from Fusion 360 as a STEP or IGES file instead of as a dumb mesh.
Then in Rhino you’ll have NURBS surfaces you can work with.
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Okay, thanks.
this can be repaired in rhino, but it would be easier and faster to redraw it from scratch. I’m guessing it’ll take less than 10 min to rebuild this correctly.
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Thanks for replying. I just redrew everything.
And then reimport it back into Fusion and see if you have a dumb solid 
Exactly right, a dumb solid!
Does Fusion 360 have any feature recognition tools like some other parametric solid modelers?
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Idk, I don’t use software that saves my files to a dumb cloud 
most of the time 
cloud seems inevitable…
And holds them for ransom no less.
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I would kind of expect autodesk to have enough bells and whistles for fusion to do nurbs or somem freeform tspline stuff idk.
but I don’t even know if I want to check the monthly fees (ransom) … not to mention add-on packages fees
$85/mo … ew.
fusion manufacturing extension an additional $122/mo, and the simulation extension yet another $122/mo … wow. Also, the design extension is yet another additional $49.5/mo… jeeze them extensions add up. I wonder which one does nurbs freeform 
“Learn about t-spline freeform modeling in Fusion. Freeform modeling, also known as SubD, offers enhanced flexibility for complex organic shapes, though it requires patience and adherence to best practices.”