Test 3D printer resolution

This is a simple design I made in OpenSCAD to test both printer and slicer resolution.
The model consist of a row of walls of increasing thickness from 0,4mm to 4.0 mm.

I have uploaded three different models for different materials.

In some slicers, the thin walls of up to 0.8mm often will be ignored and will not be printed.
In reality, the thinner walls will often not have the designed thickness.

I use these models to show customer the possibilities of my printers as well as their li