I am following some videos to familiarize myself with commands such as curve blend and surface patches. What are some commands that can turn a polysurface to a solid? I want to shell this mouse for battery and circuit components eventually.
Initially, I tried offsetting surfaces but ended up with some naked edges—possibly due to incorrect default units the template offered. It’s a bit tricky trying to progress carefully from the beginning.
Join, cap, etc. – depends on geometry etc.
It could be many things.
Rhino is very unique relative to all the other ‘solid modeling’ cad’s out there.
Rhino is like the sword of truth, that wont let you get away with ambiguity etc.
Like a surgical tool, you must be specific how your surfaces relate, otherwise naked edges are inevitable.
Rhino won’t smudge up everything much, like the other cad’s that have dirty geometry.
I kind of butchered the explanation, cause it’s not easy translating it into written language.
It takes time and dedication to learn the answers. Be patient. Enjoy the journey. Rhino is the best, so you’re definitely on the right track. 
I took this out of context with great purpose, cause this is an algorithm per say.
It doesn’t matter any ‘polysurface’ I ever deal with, I always have this in mind and have this default approach:
This will take you a bit down the rabbit hole per say.
If used correctly, this command will prevent you from experiencing the consequences of smudging workflows.
The ‘rebuild edges’ command will correct the issue when something is wrong with joining and the edges are a mess – it will lead you to see the truth about the edges.
It’s not the only solution but it’s one of the best ways to see the truth, of where your edges actually are.
Users that ignore this, imo, will have a bad time without even knowing why, or even realizing it. They might just think Rhino could be better, when it’s just a misunderstanding.
check out this video if you want to shell a part.
and this one for a more traditional approach-
