This is a re-textured hotbar. When you have a slot selected, it overlays the white gradient over the black square. The gradient is broken in 1.15+, probably due to all the rendering changes that were made
Zak Azerrad
This is a re-textured hotbar. When you have a slot selected, it overlays the white gradient over the black square. The gradient is broken in 1.15+, probably due to all the rendering changes that were made