Hello, today I was trying to create an effect that when a player would go underwater, it would give them blindness and night vision in order to create the complete blindndess effect. The commands worked but there was a graphical error on the screen, like if something was overlapping. Later, I tried giving myself the effects with the /effect give command and the result was the same. I tried to make screenshots but on the image appears black.
The steps to recreate the bug are:
1. Give yourself blindness
2. Give yourself night vision
3. Go inside water
I hope this helped!
Don't be confused with the total darkness bug when Blindness + Night Vision are combined, I am referring that when you have these effects on the latest snapshot (17w50a) and go underwater, there's an overlap effect with the water texture and the darkness. Thanks