System Information
Operating system: Ubuntu Studio 18.04
Graphics card: GTX 970
Blender Version
Broken: 2.80, 9bae9b634ec6, master, 2019-05-28
Worked:
Short description of error
Grease Pencil error in opacity values of layers with different Blend modes.
Exact steps for others to reproduce the error
Open the Pru.blend attachment with the latest build and compare it with the way it looks in previous versions. The shape that calculates the opacity of the layers in all blend modes, at lower values produces greater error as in the attached images.

