Getting bottom surface of a model I have a model that is made artificially, the model covers a square shaped area. It's something like that if you look in a cross-sectional view:
How can I remove any noise above the bottom surface of the model, leaving the vertices at the bottom that shapes the S-shaped curve? There is a bottom surface in the object, but as the surface is not modeled separately by the computer, I have no clue how to get it.
This is what I want to get:
welcome to BSE, take the same object (but has to fit the same object itself, or there will be issues with the intersections) and duplicate and move a bit in the z axis and add a boolean modifier to the target object, and set the source to the duplicated mesh, and apply boolean, good luck...