I'm having trouble with importing an STL file into S3D. When imported, it creates things that look like holes, but can only be seen from one direction (see screenshots below). Because of these "holes" it goes crazy when slicing. Although, no holes of any sort can be seen in CAD. I have also tried healing the holes by merging all outlines into single model and stuff.
It happened to me once before a couple months ago as well, but then I eventually gave up and didn't print the model.
Any help is much appreciated! I have tried restarting and re-importing the file tons of times.