While working on making holes with "Boolean" two recesses were just cut out (seethrough) instead of keeping the form of the cylinder in the hole. As you can see in the pictures all the other holes kept the form of the cylinder. I need the form for this piece and I haven't found a solution because I can't undo the things I did after I saved the project. I'd really appreciate any help as soon as possible! Thank you in advance:)

Screenshot of Problem Screenshot of Problem

  • $\begingroup$ Sometimes setting the Solver to Fast instead of Exact can give a better result. If not we would probably have to inspect the file itself what the problem with the object is. $\endgroup$ Commented Aug 4, 2023 at 14:32
  • $\begingroup$ Thank you I'll keep that in mind for the future! However, that won't help to undo the two holes that are wrong... Do you have a solution for that? $\endgroup$
    – Andrea
    Commented Aug 4, 2023 at 14:36
  • $\begingroup$ Select the face in the center, extrude it downwards, then scale the bottom to 0 on the Z axis - if it is connected to the rest of the mesh. If not, select all and press M > Merge > By Distance. Then select the center face, extrude and scale. $\endgroup$ Commented Aug 4, 2023 at 14:38
  • $\begingroup$ Can you explain that further please? I'm not quite sure how exactly I have to do that... $\endgroup$
    – Andrea
    Commented Aug 4, 2023 at 14:44
  • 1
    $\begingroup$ Okay, so there are just holes. If you do not want to or cannot redo it with the Boolean modifier because it is already applied, the easiest way would be to select the vertices on the border of a hole, press F to create a face, press E and Z to extrude on the Z axis downwards, and after extruding press S, Z, 0 to scale the bottom face flat. Combining the holes with cylinders is much more of a fuss. $\endgroup$ Commented Aug 4, 2023 at 15:43


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