Hello there! I´m trying to use Sketchup for modeling solid objects for 3D printing, but I´m having some weird issues when I download .stl from Sketchup Free (online) and upload it to Tinkercad, like shown in the following image. The result in stl is completely different from what I modeled on Sketchup
The same kind of issues happen when I move the file to Simplify (slicer).
Attached: stl file and skp file of the model.
Could anyone PLEASE help me?
Thanks in advance, good people (60.2 KB) umbtre.skp (1.5 MB)