Background Pony #11EF
The look in her eye says, “I have no mouth, and I must scream.”
lollol695

The “real” eye seems to be lifeless and it looks disturbing because of that shiver
redweasel
Duck - "someone befriended them, saved them, coaxed them out of their shell, and showed them that sex is nothing to be afraid of. I’m kind of envious of that rape victim"

Fuzzbutt
making this a looping gif seems cruel…
 
@Cirrus Light
 
I just see the 2d drawing as a window into twilight’s cartoon world, so at any angle, it’d look fine. because the 2d picture is moving too, so why wouldn’t its background appear to rotate at different angles?
ZippySqrl
HARD WERK - Merited Perfect Pony Plot Provider badge with only their own art and really hates Applejack
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Preenhub - We all know what you were up to this evening~
Twinkling Balloon - Took part in the 2021 community collab.
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
The Magic of Friendship Grows - For helping others attend the 2020 Community Collab
Lady's Wink -
Toola Roola - For helping others attend the 2019 Community Collab
Wallet After Summer Sale -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends

Tired Artist
@Cirrus Light  
I’m aware that it causes some paradoxes, it would be a completely nonsensical scenario were more than 1 person observing the phenomena, because either the 2d version or the 3d version would have to be inconsistent. Hell, it’d probably not even work quite right because we have 2 eyes that see from slightly different angles.
J4m35
My Little Pony - 1992 Edition
Artist -

Sex: Attack helicopter
Cirrus Light
Economist -
Condensed Milk - State-Approved Compensation
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An Artist Who Rocks - 100+ images under his artist tag

Sciencepone of Science!
@J4m35  
full
 
Pinknerdsftw
J4m35
My Little Pony - 1992 Edition
Artist -

Sex: Attack helicopter
@zippysqrl
 
@Cirrus Light  
Neeeerrrds
Cirrus Light
Economist -
Condensed Milk - State-Approved Compensation
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Helpful Owl - Drew someone's OC for the 2018 Community Collab
Birthday Cake - Celebrated MLP's 7th birthday
Best Artist - Providing quality, Derpibooru-exclusive artwork
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
An Artist Who Rocks - 100+ images under his artist tag

Sciencepone of Science!
@zippysqrl  
Though I’ll mention that my “headcanon” to this, if you will, is that the she becomes unaligned from any other angle. It’s the only way to remain consistent in 3d space. Example; if I put a bowl around her, and filled it with water, how much water would it take to fill the bowl? ie, how much 3d volume is she taking up?
 
Your example about the horn being either out or not is an example of how the “stay aligned from whatever perspective you’re looking at her from” requirement causes some paradoxes.
 
So I just imagine it like one of those stretched drawings that only works from one angle.
 
So, IMO, I think of it like one of these drawings:
 
full
 
Except her head is real in 3d space, but her 2d portion is like the drawing. So the portion of the sketchbook that’s flat on the table is the drawing, and the portion of the notebook that’s up on the wall would be her 3d head. Just like the drawing here becomes misaligned from other angles, Twilight’s 3d head and 2d drawing would become misaligned from other angles.
 
 
Also, it’d be a lot less freaky if her pupil weren’t more dilated in the 3d half than the 2d half. 2d part of her has a normal, happy iris/pupil. 3d part of her has a slightly different eye shape that’s also shrunken and appears stressed/scared because of it - and because the way it shimmers is subtly different (in a terrified/stressed sort of way) from the happy way her 2d eye shimmers.
Wilson8787
Non-Fungible Trixie -

This is truly exquisite.
Cirrus Light
Economist -
Condensed Milk - State-Approved Compensation
Friendship, Art, and Magic (2018) - Celebrated Derpibooru's six year anniversary with friends.
Helpful Owl - Drew someone's OC for the 2018 Community Collab
Birthday Cake - Celebrated MLP's 7th birthday
Best Artist - Providing quality, Derpibooru-exclusive artwork
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.
An Artist Who Rocks - 100+ images under his artist tag

Sciencepone of Science!
@Equum Amici  
>Hype got
J4m35
My Little Pony - 1992 Edition
Artist -

Sex: Attack helicopter
@zippysqrl  
………..huh.
ZippySqrl
HARD WERK - Merited Perfect Pony Plot Provider badge with only their own art and really hates Applejack
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Preenhub - We all know what you were up to this evening~
Twinkling Balloon - Took part in the 2021 community collab.
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
The Magic of Friendship Grows - For helping others attend the 2020 Community Collab
Lady's Wink -
Toola Roola - For helping others attend the 2019 Community Collab
Wallet After Summer Sale -
Friendship, Art, and Magic (2019) - Celebrated Derpibooru's seventh year anniversary with friends

Tired Artist
so here’s a thing you may or may not think about when seeing this: What she’d look like from any other angle, because from this angle the 2D version of her which is laying flat on the floor is warped to fit the perspective we are viewing her 3D self. For her to phase out of the picture so that all her 2D features remain where they are as they enter 3D, there is a relative axis with which either her 2D self or her 3D self must travel. In this animation you can see her 3D self moving perpendicular to the paper surface(up) while her 2D self moves backwards/forwards (from our POV), so that the features line up in time they leave the paper, but alternatively her 2D self could remain stationary while her 3D self phased through the paper directly towards us, so as to have the same effect(though not the case here, there’s not enough paper behind her). If we were looking at her from any other angle, or rather just able to move our POV during the process, the 2D version of her would have to change accordingly, and be semi-3d in a sense already. Alternatively the 3D version would have to rotate instead, which would be odd, but if we were looking at the paper from a different point of view when the phasing process began, judging by the angle of her 2D self, her eye, snout and horn would have phased through the paper first, rather than her her ear and hair and whatnot, it’s just that it’s like that because of the angle we’re viewing her 2D self determines how her 3D self is rotated relative to us.  
Understandably none of this would really matter since she’s already an animated picture on a static piece of paper, that is then phasing into the real world, but that’s just a thing I thought about.
J4m35
My Little Pony - 1992 Edition
Artist -

Sex: Attack helicopter
BEGONE DEMONS  
full
DronaPon3

12 years of Derpi
Twilight, stop. You’re scaring me.
PostPony

This is not safe, this is grim dark
PostPony

This is freaking me the fuck out
Wingnut
Since the Beginning  -

HOLY CRAP
DronaPon3

12 years of Derpi
@Rdobet  
I SHOT THE SHERIFF  
But I didn’t shoot the deputy.
Frannis
Artist -

FanOfManyShows
This is so real, it’s creepy.
Sour Grapes
Non-Fungible Trixie -
Not a Llama - Happy April Fools Day!

Come on laddies! On the count of three!
I, Da Witchfinder

Give G5 A Chance
Holy crap, it’s animated. I did not catch that at first glance.
Background Pony #F2A8
So this is what would had happened if Sony made the MLP film
bigladiesman
Non-Fungible Trixie -
My Little Pony - 1992 Edition
Not a Llama - Happy April Fools Day!
Speaking Fancy - For helping with translations

El retorn de Jan
Things in the 4th wall belong there.
Oatsy
SMILE - Obsessed
Equality - In our state, we do not stand out.
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A Perfectly Normal Pony - <Oatmeal> "If her age is on the clock, she's old enough for cock."
The End wasn't The End - Found a new home after the great exodus of 2012

Sometimes Not Dead
@newsketches  
and that she’s the Sheriff.