The Mistveil ENBs born from a simple concept: to give the players a specific atmosphere for their Skyrim, based on the 4 seasons: Winter, Spring, Summer and Autumn.
Every preset has its own personality, focus and obviously its own setting files.
The four presets are meant to use almost all ENB's features, so they could be quite demanding in terms of performance.
However you are free to ask tips and advice to increase the performances, but keep in mind "asking is lawful, answering is courtesy"

The Mistveil presets offer the player many features adopted in other wonderful settings like K ENB and Phinix ENB
SMAA SubPixel Morphological Anti Aliasing, SweetFX integrated
Boulotaur's SweetFX Version, credits to CeeJay.dk and Boulotaur
Chained HQ PostSharpen Plugin via InjFX Shaders
Custom Bloom by Kyokushinoyama
Kinematic Sharpening by Kyokushinoyama and Zeroking
Extensive Sunsprite Shaders and Textures by --Jawz--
Anamorphic Lenz Flare, credits to Matso
Customizable Dynamic DOF, by Kyokushinoyama
SweetFX shaders, courtesy of CeeJay.dk and Boulotaur
Enbeffect.fx codes by Kyokushinoyama, HeliosDoubleSix (HD6), ZeroKing and --Jawz--
Color Correction integrated in the ENB GUI, by --Jawz--
Eye Adaptation Code and HD6's color correction code GUI integration with interior/exterior separation, courtesy of Phinix

First of all you need the .221 binaries (wrapper version only) on ENBDev, but you can use the previous binaries starting from the .217, downloadable from Beautiful Skyrim.
Very Important!
1)Clean your Skyrim folder from every ENB file you were using before, especially injector.ini because it is not needed and causes graphic issues.
I also suggest you to delete the folder named enbseries because certain presets' files can conflict with The Mistveil ENB, since it uses its own.
2)Go to MyDocuments/MyGames/Skyrim and edit Skyrimprefs.ini as it follows:

bFloatPointRenderTarget=1

bTreesReceiveShadows=1

bDrawLandShadows=1

bShadowsOnGrass=1

Now we can proceed to the Installation process:

For more info Jawz ENB GuideIf you wanna update to binary .234: download the archive under "UPDATES" and follow the instruction written above.Latest binaries supported: .250 and .260
To use the latest ENB's feature you need a water mod compatible, at the moment I know of:
WATER - Water And Terrain Enhancement Redux
Pure Waters

Before installing a new enb preset I suggest you to do a clean uninstallation of the previous ENB preset:

This is a list of the mods I personally used while tweaking, they are not strictly necessary but for the best visual I recommend you to download them:
Mindflux's Particles Patch
Revamped Exterior Fog
Enhanced Lights and FX (NO ELFX - Exteriors.esp)

These are the mods I consider useful for enhancing your Skyrim experience and that works well with The Mistveil presets, give them a look!

Real Clouds or Dramatic Clouds
Texture Pack Combiner
Vivid Landscapes - Volcanic Area
Realistic Water Two or Pure Waters
Skyrim Realistic Texture Overhaul
Skyrim Ultra HD Texture Pack
Perfect Whiterun
Superior Rock Textures - Hiqh Quality HD 2K and 4K and 1K replacers
Improved rock and mountain textures - 4096x and 2048x
Skyrim Flora Overhaul
Amidianborn Caves and Amidianborn Whiterun
Amidianborn Book of Silence
Unique Grasses - Nature and Landscape Enhancement
Ruins Clutter Improved
Smoking Torches

If you need assistance you can ask on this modpage, I'll do my best to help you (or if not me, the most experienced users will), I ask you to read carefully the Installation instruction or eventually the FAQ that I'll try to update regularly.
Please use the "SEARCH" button before asking.

- Is it compatible with CoT or other weather mods?
I don't use them and I haven't tweaked these preset on those mods, so I suggest you to NOT use them.
If you do and the presets have issues or they don't look as they would, it's on you.

- Is it compatible with Lightning Overhaul mods?
The only one is ELFX and ONLY the esps for interiors, like I wrote above.
You are free to try them, but I can't guarantee the result and I'll not take responsability for it.

- I have a big performance drop, what can I do?
First of all, check the enblocal.ini's VideoMemorySize, have you followed the formulas I wrote? Have you tried all three of them?
Consider that The Mistveil can be demanding on AMD graphic card, but usually what hits more the performance are these values in enbseries.ini:
EnableSkyLighting=true
EnableReflection=true
EnableDepthOfField=true
EnableAmbientOcclusion=true
You can try set them to "false" starting from the first one, you'll probably lose some visual quality but you'll gain some FPS.
Another way to improve performance is disabling injFX.h by editing this line in SweetFX_settings.txt:
external_d3d9_wrapper = d3d9_Sharpen.dll -> change to "none"
This will also speed up the loading screens, at cost of color precision and sharpening.
Don't expect miracles, though.

- The nights are too dark!
Use torches, magelight, candlelight.. the nights in these presets are supposed to be dark, yes.
And I will not change them.

- The shadows are too dark!
This is something I concede to change, go in enbseries.ini and find these lines:
[SKYLIGHTING]
AmbientMinLevelSunrise
AmbientMinLevelDay
AmbientMinLevelSunset
AmbientMinLevelNight
AmbientMinLevelInteriorDay
AmbientMinLevelInteriorNight
The higher the values, the brighter the shadows. But WATCH OUT! It will change ALL the shadows in that specific daytime! Nights aren't affected!

- What mod are you using in the picture xxx ?
I put the author name in the picture, you have the links of their profile below, ask them directly. That's the best I can do to help you about this ^^'

- Are you the same Modd3r from Differently Ebony and Glass Variants? When Cabal120 will release *randomtexture* ?
Ehm.. yes I am, but this isn't very related to The Mistveil ENB, isn't it?

I already credited most of the people about technical stuff, but here again:
Boris VORONTSOV
SMAA SubPixel Morphological Anti Aliasing Team
CeeJay.dk and Boulotaur
--Jawz--
Matso
Phinix
ZeroKing
Mindflux, known here as artem1s

My personal thanks to the following people, which helped me and supported me:
Kyokushinoyama - the master, the shishou, the one from who I learned what I know about the ENB and its tweaking.
anaphiel - it all started one day when I asked "how can I increase The Goddess ENB contrast?", I took the first steps after that moment.
JoPineapple68 - First ENB preset played, first time as a ENB tester. Dark ENB is what inspired me in making The Mistveil ENB.

All the people that tested, gave me feedback and spammed on Nexus and Flickr my presets in the last week and before:
Whisper of Winter Edition
amoebae*
Caelrya*
Amiable Archer*
innova*
King Uggi*
Jorundr (previous testing phase)
Welsh Pixie (previous testing phase)
Mirage of Summer Edition
Kyerea
sayka83
Kalilies
xbullsx*
Azeneth*
Memory of Spring Edition
*Echtelion
toro66ro
wonkonuba
m14aria*
DoubleH
Shades of Autumn Edition
Joshua Ezzell
Yoru no Kaze
Zenoxua*

For the Comparison GIFs
m14aria for making all the GIFs by using the following users' screenshots:
Amiable Archer
Zenoxua
xbullsx

I do not allow any redistribution of my presets or any other permissions on the files inside.
The credited files inside the presets belong to their creators and you need their permission and/or you have to credit them.