In 1.10.x and previous versions, the End Portal effect was using a nice parallax effect which gave sensation of another world.

Since 1.11.x, the End Portal effect is using a broke parallax effect, making weird sensation, especially when cursor is visible.

See the 2 GIF trying to show the difference between the two. Not sure this change is intended knowing the parallax is wrong and the stars are now animated (they were static before).

> 1.10- effect = Parallax effect on multiple layers (with different offsets)

> 1.11+ effect = No Parallax on multiple layers (same offsets)