I have solved my problem! Thanks to you who have provided me the link to the green water fix, I was able to know where to search to solve it. It appears that Bethesda added the Image Space 'UnderwaterImageSpace' in updates.esm, with Depth of Field parameters. That explains why I did not have this blur when launching skyrim without it. I asked my brother (who has never used any mod whatsoever) to see on his game and he had indeed this blur on his character when viewed from far behind in 3rd person. If you check in your game you should also see this blur. Then, I opened ELFXEnhanced.esp in TES5Edit and I've seen that indeed these parameters had been tweaked, worsening the blur. Here is a printscreen of TES5Edit where you can see the parameters. And some screenshots with the parameters I changed. http://i.imgur.com/q8sLKwp.jpg (Range 100.000; Sky/Blur Radius Radius 5, the parameters set in ELFXEnhanced.esp) http://i.imgur.com/HezYTMl.jpg (Range 100.000; Sky/Blur Radius Radius 2), we can see that a lower value diminish the effect. http://i.imgur.com/IbfYyj7.jpg (Range 500.000; Sky/Blur Radius Radius 2, the parameters set in updates.esm) http://i.imgur.com/p0RVDWJ.jpg (Range 500.000; Sky/Blur Radius Radius 5) Not much of a change I think. http://i.imgur.com/qhQImMB.jpg (Range 1000.000; Sky/Blur Radius Radius 2) That's more acceptable! http://i.imgur.com/Ah5qR31.jpg Range 1000.000; Sky/Blur Radius Radius 1) The blur is less pronounced but still visible in the distance. :smile: I've finally decided to go with parameters set as Strength : 0.5 (instead of 1), Range 2000.0000 and Sky/Blur Radius Radius 2 and I like it this way. :D Thank you for your help and I hope my long head scratching will help someone if needed. ^^