You can put negative blocks through blocks and union them to make a hole in the block. Sadly, you cannot union stuff with a mesh on it. I tried it and it wouldnt let me. But my question is, is there another way to put holes in blocks without using negative blocks and unioning them together?
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Not that I know of, unless you edit the mesh to have a hole in it; Or make a shape with a hole in it made out of parts.
Thanks for the help 
I would rather edit the mesh because making 1 block with lots of blocks in it may cause lag.
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