Fix of Unnecessary raft on models with large perimeter but nothing inside. #430 Don't fill in the holes in 1st layer of the raft. The user may apply a higher raft_expansion if one wants a better 1st layer adhesion.
Fix of Unnecessary raft on models with large perimeter but nothing inside. #430
Don't fill in the holes in 1st layer of the raft.
The user may apply a higher raft_expansion if one wants a better 1st layer adhesion.

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