How can I merge two or more surfaces together to have one surface?


Maybe this solution is too easy, but you only need the JOIN command
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Step 1:
more than 40 surfaces
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Step 2:
pick the JOIN command
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Step 3:
select all surfaces
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Step 4:
result: JOIN (one surface"
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Step 5:
or if you need a "dumb" surface
create datum mode -
Step 6:
again the JOIN command
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Step 7:
one "dumb" surface