Measuring pressure banding

Background

See: Pressure banding

How to test

Open Krita

Ensure all pressure curves in driver and in Krita are set to the null pressure curve

Create a brush with

• Width 100px

• Pressure mapped to opacity (press harder to make stroke more opaque)

Draw a series of horizontal and vertical lines at a constant pressure - towards low end of pressure

Perform some contrast enhancement on the image to help see the banding

A good result - no banding

There is no banding here.

A bad result - banding visible