Shell thickness and nozzle are bounded. This is the reason why in 99% of the cases, shell thickness and nozzle have the same value.
The layer view allows you to see the shells, which are the red and green parts. The whole perimeter is made up of shells.
The red parts are the outer shells, while the green ones are the inner shells.
There are some slicing softwares where you need to enter a certain number in the shell thickness parameter (for example, 1,2,3…).
For other Softwares, you need to enter the dimension (like 0.4mm, 0.8mm…)
There are two major rules: 1) the number must be positive and other than 0 and 2) it must be a multiple of the nozzle.
Let’s see the changes when we modify the shell thickness parameter.
When you have a medium/large object, the shell thickness gives it additional strength, creating a solid bark.
Instead, when you print small entities, it’s best to lower the shell thickness and add more infill.
Thanks to these tricks, we can create thin solid objects.
It’s important to properly manage the shell thickness because it’s a parameter bonded to the mechanical resistance of the object. The wrong value can bring unpleasant errors in the 3D entity.