Aimed the app at the colored glass that sits on the windowsill in my office. In my main 365 album I’ve posted a triptych showing the same subject and same effect/filter adjusted in the middle and at extreme ends of the scale. https://365project.org/mcsiegle/365/2018-06-21
The user interface is not the greatest. Some filters require swiping again and again to adjust. This one is pretty responsive.