Odd darker grass resolution/box.

[xll1999]

I have just found some odd issue with my grass, that there is a box of lighter grass, and outside it it is darker

It is extremely infuriating and overall making me look too much at it

Removing Verdant and Shift+F12ing my ENB changed nothing, issue still persists

Modwatch : https://modwat.ch/u/LYNXEMS/plugins

Attached file, the bottom of the box is clearly visible, side might be less

It is only seen on grass, not on rocks, roads and so on.

Thanks in advance for anyone caring.