Well knowing that you need to dry filament is not a bad place to start if that’s the first thing you learned in this craft.
It took me a long time to learn that lesson and not accept the assumption that manufacturers actually dry their filament. I proved that again a few months back when I dried a brand-new spool of Bambu Silk. I thought it was just bad filament, and it was, but the filament performed much better after I removed nearly 3% moisture.
Yes, the cube primitive is just a shape of convenience; a cylinder or disk primitive works just as well. The key is to create something the height of one filament (0.20 height usually guarantees this). By eliminating top and bottom layers and modifying the infill, we trick the slicer into creating a surface resembling a brim, even if it doesn’t follow the base of the model.
One thing you may have discovered is that you can’t suspend a model in thin air; the slicer will drop it to the plate and auto-level. To stack items, use the vertical move function as part of an assembly. The slicer will fill in the space below with supports if enabled or flag a cantilevered overhang if you forget to turn on supports.
Here’s a trick: if you create any two objects, such as a primitive and anything else, as an assembly, the assembly follows the same behavior as any model in that if you try to move it vertically, it just falls back to the plate. However, if you select the object by itself within the assembly, the slicer will move that independently, and whatever is the lowest object will determine the base. Here’s a demonstration.
![Lift cat](https://cdn-forum.bambulab.com/original/3X/0/7/076ad8a69fe7b66d97e3c75c7b377bac2a0164c1.gif)
Now that the cat is suspended in mid air, if I have supports turned on and slice it, the slicer will place supports underneath because as far as it knows, there is plastic suspended in mid air and needs something underneath. The fact that it’s not ‘physically’ connected to the disc doesn’t matter.
Here’s an exaggerated viewpoint after I slice it. The disk is still at the bottom of the assembly and that’s where the slicer will anchor the assembly to the plate. But by independently moving the object, I can make it hover is space.
Now if I move the object, not the model to a 5mm height.
Then slice it, it starts to look more like a fake brim. Just size it accordingly for your height and you will get the desired affect of a multilayer brim.
If we place two discs in an assembly and space them apart vertically, then reduce the walls, top, and bottom layers to 0, I get a hollow shape that consists of only infill. By changing the infill to a suitable pattern, such as rectilinear, and varying the density, I achieve a ‘thick fake brim’ effect.