You can create a straight flat cut thanks to Plane Cut, in the Edit section.
This option makes it quick and easy to cut an object. You can export both your half, one by one.
Plane Cut has a useful function: it recognizes whether there’s a hole in the item or it is entirely closed correctly.
Here’s an example of a Cut where you can see a hole in the model:
Remember: the pink parts are the inner facets!
Let’s see this example:
Open a sphere, click on Edit > Plane Cut.
You can choose whether you want your cut to be on the X, Y or Z-axis.
You can draw an imaginary line or move it from the location arrows.
Plane Cut automatically deletes one of the two parts of the model.
However, there’s a trick: after you’ve exported one part, you can CTRL+Z and invert the Plane Cut, thanks to the blue arrow.
This way, you’ll be able to cut in half your object and export both parts.
As follows, you can see better the blue arrow that allows the Plane Cut to switch:
After you’ve exported both files, you can close MeshMixer.
Open the software again and import the previously exported models.
You’ll notice that they’ll be divided, but located in the same place as they were before.
You can choose between 3 types of fo cuts from the dropdown menu Cut Type.
Slice Keep Both allows you to select your 3D model without deleting one of the 2 parts.
The Fill Type dropdown menu lets you define some parameters about the plane cut.
For example, if you click on No Fill the cut section will be left open.