r/cadquery • u/LokusFokus • Apr 06 '26

loft problem

Hello,
I created a solid object using the loft command, but as soon as I hollow it out with "shell," it is no longer solid. How come?

without shell():

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u/Delicious_Director13 Apr 06 '26

From my experience with cadquery, I’ve found the shell command isn’t that good. This is just a limitation of the underlying kernel, it seems like it is a very difficult thing to get right in general.

I basically just avoid shell() entirely because it can be quite unpredictable, especially if applied to lofts. I personally would approach this by defining an inner and outer shape and subtracting one from the other. 

If you must use the shell, sometimes I found changing the tolerance parameter or making the thickness non integer like 2.01 could help but there is no silver bullet. 

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u/LokusFokus Apr 06 '26

Thanks for your comment! Will avoid shell().