"I think it would be great (and probably easyish) to have the "bottom" layer optional."
I'm a total noob, just been printing for a few days, but I already see a huge need for this. When printing objects you want to be hollow, you usually don't want the bottom layer, and the only way to do that and get a nice top is to hollow out the object by hand (which is a royal pain given how often meshlab crashes).
What would be even more useful would be the abillity to have the bottom layer be a "lip" that extends in from the model edges by some programmable amount, to facilitate gluing of multipart models. And if you want to get really crazy, add the ability to put in N registration holes equally spaced radially from the center of the model at a specific inset from the edge of the model.
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cora111 0
Yes, it does. It adds 'sparse infill' and 'crowning' to the parts that go below the wall thickness.
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