How do I make the slicer recognize the hole in the middle of my modal?

It is a modal of a goat that is supposed to have a hose that water can go in the front and out the back. Outside of the goat, the pipe is represented fine, but for some reason, inside the goat the pipe is not recognized (see screen shots below). Is this just a problem with the model (it does not find any malformations when I slice it) or are there a setting that I can change to make it slice the way I want? I have attached the relevant .3mf.




Goat_with_no_horns_2025-12-09-1804.3mf (628.0 KB)

The slicer is trying to combine those two objects. The goat’s surface makes a complete shell, so it doesn’t try to alter that during addition.

Perhaps in blender make a third body, that is the inner “void” diameter of that pipe. Then in the slicer, you could assign the “void” part as a Negative Part, so that it can punch holes in bodies its trying to combine with

model issue. you should be making the hole in your modeling software.

When you just position two separate pieces of geometry so they overlap, the slicer will attempt to slice the two objects as if they’re really just a single combined object. They’re “added” together.

Stack 3 progressively smaller spheres, with a little overlap, you get something that looks like a snowman. The slicer will probably slice it fine since there’s still a clearly defined outer perimeter. But they’re still 3 separate objects. That internal geometry that’s not visible is still there. Slicer may or may not ignore it.

If you have a solid object, say a sphere, and you want a hole to pass through it from one side to the other, you can’t do that by making a pipe and overlaying it on the sphere. The pipe is a solid, the sphere is a solid, the slicer will add them like the snowman example.

To do this, you need to subtract the pipe from the sphere (note, I’m saying “pipe” but really it should be a “rod”, not hollow down the center, a complete solid). Something I would normally do in CAD. But Bambu Studio has some limited support to add, subtract and do a couple other operations related to combining geometry, I think.

Leave everything positioned as it is, and subtract the pipe from the goat and you’ll end up with a hole that’s the shape and size of the pipe that passes through the goat.

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