InventoryBlur Blurs the background of inventories and overlays.
What does it look like?

How to enable InventoryBlur
Press esc to open the Badlion Client Settings Slideout
Search for “Inventory Blur” (be sure to have it enabled like in the picture)
InventoryBlur mod settings
Dark Inventory Backgrounds (The Fast Render option must be disabled for this feature to work.)
