Simplify3D User Forum

Hi!
I have a pretty clean 3D file, the mesh arrangement seems to work, but the print preview is aweful (see pictures).
How can I fix it?
It was designed with blender.
Thanks!
J

If you have Windows10, load into the Windows app 3DBuilder. It will auto-clean the shape geometry...then save as a .3MF file.

If you don't run Windows, use one of the online shape cleaner tools to do the same.

Alternatively, post your .STL file here and I'll run it through 3DBuilder for you.