Hi,

I’m a newbie when it comes to 3d printing, and I’m trying to get some tips here and there.
My issue, as the title suggests, is that when I import my stl file into S3D and generate the GCode, the preview shows that the inside of my object is not hollow anymore, but filled with several layers. For example, if I had a hollow cylinder to print, the preview would show a cylinder filled with layers.
What can be the issue? Can it be related to the thickness of the model?

Please help.

I didn’t find the right solution from the Internet.

References:-
https://forum.simplify3d.com/viewtopic.php?t=9199
Online Video Production Service

Thanks!