Advanced Overhang Recovery Test

Situation: 

Sometimes you have to arrange your print in a way that is optimal for the print as a whole but will exceed the critical overhang angle in some small or minor regions. Exceeding the critical overhang angle leads to deformed/misshapened walls, this is a widely known phenomenon.
Continuing your print, at a certain point/some layers above, the angle of this small region again drops below the critical overhang angle. Now there are two possible scenarios:

1. Every subsequent layer that is applied on this deformed wall, will also be deformed since its base is just too out of the desired shape. This effect can even spread across large areas of the part!
2. Your print recovers and continues nicely printing the overhang (below the critical limit angle)

The question is: 

Can your print recover once you exceeded the critical overhang angle?

This advanced overhang test has several advantages:

• it not only lets you determine the critical overhang angle
• it also provides you with the knowledge about the angles exceeding the critical angle and the print can recover from
• due to its thick wall you can also test parameters like increasing the number of walls
• one side of the test has a round edge, the other side a pointed corner, which will usually lead to a different behaviour

My concrete use case was a handle I printed with a 45° angle in PETG with just two walls and 15% infill. The same print with increased the number of walls to five and infill to 30% failed. Just this small change in the printing parameters caused the print to fail.

In your slicer software just put a negative modifier on the test part you don't want to print.