Try placing 100ish or more tnt carts on a single rail, then push them off while flying or jumping (for vertical acceleration).
Its not night vision potion or fast graphics, i tested it with out and i had the same result.
The solution is if you use mcpatcher, turn off mipmapping
Also the effect is not seen when i am close to the specified blocks or past a certain distance away.
The yellow water was not from an edited swamp biome water color, btw
Nope, standing right on the ground
Or even better, you should be able to dye it any color. Like minecraft would just take the white wool and use that and a custom color like how the biome colors work. and mixing the dyes could give you an in between color, like dark red from red and black. Or a very light blue from 3 bone meals and one lapis.
I hope this gets removed soon