Polar Coordinates

[mateuszh2945192]

Hello,

I am using this filter for years now but I have never experienced such thing. I am using Polar Coordinates while retouching nadir and zenith in spherical panoramas.

So my workflow is like:
1. Using Polar Coordinates (rectangular to polar)
2. Retouching image
3. Polar Coordinates (polar to rectangular)

So far it worked smoothly but today I experienced some issue whith coming back to rectangular coordinates, please see image below. It creates some weird artifacts. Has anyone have any explanation for this? Thanks in advance!

 

[c.pfaffenbichler]

I suspect that is to be expected when applying a vehement Filter like Polar Coordinates twice.