Minimum wall thickness is defined as the minimum thickness that your model should have at any one given point.
In the case of the image above d=1 is the minimum thickness.
If you are designing a cylinder, for example, the cylinder itself should have a larger diameter than 2mm at all points. If you would turn that cylinder into a straw, the edge of that straw would need to be 2mm thick throughout its entire length.
The minimum wall thickness depends on the material you choose. Check out our Material pages to learn about the requirements for each material.
Minimum wall thickness issues are fairly common. In the virtual world of a rendering, a model can have any dimension or be as thick or thin as desired. If this model were to be printed in the real world, there would be some constraints:
Our Material pages mention certain minimums for wall thickness, which refers to a thickness we can print successfully. That said, we recommend making walls slightly above the minimum thickness recommendations to avoid any issues. It's also recommended not to make large portions of a model at the minimum thickness as this would make the model excessively delicate.
For scale, it's behind a standard white board marker. Here you can see that the model is quite detailed. The model is so detailed that some of the finer details, like the pupils in the eyes, cannot be seen in this image.
This model's walls should always be at least 2mm thick. In this case the legs of the model are 2mm in diameter.
The tongue itself is 1 mm in diameter at its thinnest point. Should the whole tongue be this thin, it would become very fragile, therefore not something that's recommended.
As a test we have designed a model with a 1mm wall thickness all the way around:
This model is very fragile and prone to warping. As you can see below, this can cause issues during printing:
Here's a top view showing the printer error:
It is possible to measure the thickness of a mesh within most design softwares. To ensure that models are printable in a sustainable way, we advise to keep these wall thickness guidelines in mind.