Secret settings.

[Tewi_Inaba]

I found out in minecraft 1.7 there are secret settings you can use that make your game look a lot differant. it's compleatly random from what i can tell but a lot of what i saw looked really cool

[Suzzie2]

Think it goes in a pattern, cause I got the same one twice

[Nitori_Kawashiro]

The last one kinda reminds me of the Aether mod. I think that one used similar colors.
And that 3rd screenshot looks awesome.

[The_Deathly_Kappa]

I love the one that flips the screen. XD Reminds me of Seija every time.

[Tenko]

Since it's probable that someone on the 'net already listed out where it is, it's possible to recreate Sonic Ether's shading using this

[Cucoo5]

*first reaction when looking at the pictures:
"Am I high?"

[Tewi_Inaba]

The last one kinda reminds me of the Aether mod. I think that one used similar colors.
And that 3rd screenshot looks awesome.

that one was actually changing the color constantly in a rainbow pattern and looking all waveish like you had just taken acid kinda hard to show that in one screanshot though

[Shimitty]

As far as I can tell this is mostly just filters and not actual shaders. I'd wait a while before saying this could lead to something like SEUS.

[Tewi_Inaba]

actually this dose have potential. i got a few that did some pretty odd lighting. But i don't think Jeb is going to put anything on there as demanding as SEUS himself. I am curious though about how this will effect shaders in the future though.

[Katrix]

@Shimi

Actually as Evan pointed out this is the basis for implementing actual shaders into minecraft. That's what I'm hyped for, not these presets.

EDIT: Found this. Custom shader in 1.7