Can somebody explain me why the inset faces isn’t working properly? I pressed I and 1 and this is the result, what I’ve missed?
I’ve answered this question before!
Your cube has a default dimension of one. Which results in a 2x2 block.
If you do an inset of 1, the left, right, top and bottom edge, going inside with factor 1.
Ending in the middle.
Your thickness is 1meter !! And your cube is 2.