Bryster,

You can certainly use negative metaballs to cut away parts of positive metaballs, which is a boolean operation. And while you don't HAVE to group metaballs the way you have to group other objects to get them to boolean, you CAN group them if you want to control multiple sets of  metaballs independently. You can't use the intersect boolean function on metaballs & you can't boolean them with other types of objects, but positive/negative works just fine. This may be what you meant, but I think it's misleading to just say "You can't boolean metaballs"...

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