Increasing the number of to the maximum in your slicer settings so the part prints with 100% density.
Sketch a profile and select an axis to rotate it around. 123448
Joining separate mesh sections into one watertight volume using tools like or Blender . Increasing the number of to the maximum in
If you have a collection of surface sheets that form a closed "box," you can use a Knit or Stitch tool to turn them into a single solid body. 123448