I exploded my object and I need it to be one shape again

I know that I could join the surfaces but I don’t want it to be hollow and for some reason, splitting into a new shape does not work well

Hi @nlee9761
I think we need to see the file or at least some screen grabs of what you are trying to achieve here - the description is a little vague. If you join all the surfaces and it creates a closed polysurface, that’s the closest thing to a solid you’ll get in Rhino.
-Jakob

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Have you tried “createsolid” command?
Rhinoceros Help - CreateSolid | Rhino 3-D modeling (mcneel.com)

Thanks I’ve tried that now and it only makes some of the objects solid