With a 50% moon last week-end I gave the Eagle Nebula or more specifically the Pillars of Creation 320 Lights and 9 Darks x4 sec with UHC Astromik Filter stacked in Sequator ( DSS didnt complete twice=Fail) has given the result of a nasty cross grid shaped pattern. I haven't been able to remove this aberration using Gimp or PS Cs3 (which I'm new too). I would appreciate some advice. In hopes of such here is a link to the raw file ( 93MB)!
https://naa5r8c6.filegear.me:9443/l/r/n/s/lbimevai