Self intersecting mesh creates gap

[StarShadow]

Consider the highlighted object in image A, it intersects itself in the loop:
My problem is that when I generate the code, the area where the mesh intersects itself is left blank. (Shown in image B)
No matter how I tweak the settings, I can't get it to fill in that area. Is there any way to fill in the area where it intersects itself?
(I just got the program, so I don't know about all the fancy features yet)

Using the "Separate Connected Surfaces" option, it fixed the problem in most cases, but there are some spots like in Image B where there is still a hole.

Image A:

Image B:

[CompoundCarl]

Each STL file should represent it's own water-tight 3D solid. You can't have multiple self-intersecting parts in the same STL file. That's not a valid 3D mesh so the software won't know what to do with it.

If you want an easy fix, you can use the software's "separate connected surfaces" option to break it up, however, the best thing to do would be to properly boolean these different 3D models together in whatever CAD package they were created from.

[StarShadow]

Each STL file should represent it's own water-tight 3D solid. You can't have multiple self-intersecting parts in the same STL file. That's not a valid 3D mesh so the software won't know what to do with it.

If you want an easy fix, you can use the software's "separate connected surfaces" option to break it up, however, the best thing to do would be to properly boolean these different 3D models together in whatever CAD package they were created from.

Yeah I used that option and it fixed it for 90% of the parts. (It was all one giant part until I separated it)
But since that one section is a loop, it doesn't count as two parts, and it won't separate it. I don't use any 3D software, so I don't know how to fix it myself (I tried blender, but I don't know how to use the program or what needs to be done to fix it). This is a model that I purchased from a website.