What's The Deal With Depth Of Field

Рет қаралды 111,421

Жыл бұрын

Present in every game cinematic you've ever seen and now making its way to real time rendering, depth of field is one of the most, if not the most important effect for taking your graphics to the next level.
Topics covered: How cameras work, circle of confusion generation, proper near and far field blending, the bokeh blur, the karis average, and inverse tonemapping.
Real life example photos provided by: / alonelychime (please follow them!)
Download my GShade shader pack!
github.com/GarrettGunnell/Ace...
Support me on Patreon!
/ acerola_t
Socials:
Twitter: / acerola_t
Twitch: / acerola_t
Discord: / discord
Code: github.com/GarrettGunnell/Ace...
References:
Practical Gather-based Bokeh Depth of Field - Wojciech Sterna
Efficiently Simulating the Bokeh of Polygonal Apertures in a Post-Process Depth of Field Shader - L. McIntosh, B. E. Riecke and S. DiPaola
Music:
Sandgem Town (Day) - Pokemon Diamond OST
Joy - Persona 3
During The Test - Persona 3
Afternoon Break - Persona 3
This Mysterious Feeling - Persona 3
Like A Dream Come True - Persona 4
Soft Oversight - Sonny Boy OST
ソウとセイジ - Sonny Boy OST
GO!GO!STYLE - Paradise Killer OST
arrow in thumbnail drawn by thlurp
Thanks for watching!
This video is dedicated to my friend, Alotryx.
#acerola #graphics #gamedev #unity3d #graphics #shaders

Пікірлер: 499

@Acerola_t Жыл бұрын

Sorry everyone I had to make an emergency vet visit so I couldn't catch the audio error Thankfully it's not very important, I just said that a camera doesn't distribute rays along a gaussian, so gaussian bad. Hope that helps!

@forrestppando Жыл бұрын

Hope your pet is okay!

@sixty502 Жыл бұрын

I was 60% sure it was an intentional joke

@TheBigYC Жыл бұрын

Unwatchable. Reported to the FBI.

@sebastienpautot Жыл бұрын

@@TheBigYC Acerola can beat the FBI easily, his weapon is sharpened with a DOG.

@Acerola_t Жыл бұрын

@@forrestppando She's fine! Just had something stuck in her eye that I couldn't flush out myself.

@ShuckleII Жыл бұрын

As someone without perfect vision, depth of field just makes things look like my vision got 5x worse and it hurts, so I turn it off in almost every game

@milosz204 Жыл бұрын

My vision is sharp but I do get the same feeling. I think many games use this and other effects wrong and while they do make the game look better, they also get in your way making it harder to see some details and make you strain your eyes unnecessarily.

@mememanfresh Жыл бұрын

same bro it just looks like myopia

@andrewf8366 Жыл бұрын

I think the core issue is that in real life your eyes adjust to focus on what you want to focus on, while in an image your eyes can move around the image and there's no increase in sharpness in that you're trying to look at because the image has no idea what your eyes are trying to do

@realdlps Жыл бұрын

Bloom is the same for me, it feels like I took my glasses off

@squirrelsyrup1921 10 ай бұрын

Wouldn't it be great to have forced depth of field, bloom and motion blur in real life

@cubo9620 Жыл бұрын

dude i really wasn't getting it until he explained it at 4:39, thank you bro 🙏

@spuddie3207 Жыл бұрын

and remeber kids, once you setup your post-processing effects; reduce them all by 75% : )

@Meg_A_Byte Жыл бұрын

Words of wisdom!

@nguyenhoangminhtrung2779 Жыл бұрын

I love how much art skill this guy has, and he still includes the "transparent" background for the arrow.

@mu4784 9 ай бұрын

Honestly super good for contrast!

@monad_tcp 5 ай бұрын

Obiusly , otherwise how do we know it was transparent ?

@denovodavid Жыл бұрын

Thank you for making graphics programming accessible, understandable, and of course, fun ❤

@Acerola_t Жыл бұрын

Thanks so much!!

@meqativ Жыл бұрын

five a dolar

@Choppy_Z 11 ай бұрын

@@meqativ???

@ravener96 8 ай бұрын

@@Choppy_Z five A$

@meqativ 7 ай бұрын

what the fuck was the meaning of my previous comment

@clearskyy Жыл бұрын

this is seriously one of my favorite channels on this platform, god tier content

@QuroWebArchive Жыл бұрын

Trueee 😫💀

@MrBb155 Жыл бұрын

Facts!

@sexy_koala_juice Жыл бұрын

Legit, props to you @acerola !!!

@artsyaidan Жыл бұрын

Something useful that I think may have been missed here is that optically, 1/3 of the "blurring" occurs on the far side of the focus distance while 2/3 on the near side. That may be why some of the examples are a little off of realistic, since they have a 50/50 split making the background more blurred and the foreground less blurred than they should be. (But I am just a photographer, not a shader programmer, great video! ✌️)

@toastbrot97 Жыл бұрын

The octagon blur is probably more accurate if you're trying to simulate lenses with a smaller aperture, since a smaller aperture will exaggerate the actual shape of the aperture rather than averaging it to a circle. And since many lenses in the consumer market have between 6 and 10 aperture blades it would mean that on lower aperture values you would get a none circular bokeh. So if you really wanna go for ultimate realism you might wanna consider implementing a blending between circle and octagon or heptagon if the intesity of the blur gets lessened.

@LukeFlavel Жыл бұрын

The amount of talent you display in these immensely technical yet wonderfully engaging videos is just unreal.

@Acerola_t Жыл бұрын

Thanks so much!

@Dawwo-qo3ky Жыл бұрын

That moment when you check the playlist and stumble on an unlisted video

@Acerola_t Жыл бұрын

lmao whoops

@timrobins98 Жыл бұрын

Just to clarify, a "small" aperture like f1.2 will have a smaller range of focus, but small is a misnomer. While the number gets smaller, the opening of the aperture actually gets bigger, so a large aperture like f18 will be a physically smaller opening, letting less light through, but also increasing the range of focus.

@ratguy9281 Жыл бұрын

loved the part where you said 👍🏾

@VetNovice Жыл бұрын

Every time you drop a new video I’m ready for your humor, wit, and condensed learning. You’re one of my favorite gaming channels lately. You’re out of my depth of field in skill.

@Acerola_t Жыл бұрын

Thanks Alex!

@ironfoot1938 Жыл бұрын

It's kinda sad that DoF looks so amazing but is really stupid if you want to look at something out of fokus. I guess that might be fixable once we get an eye tracker to fokus on the part we are looking at, but until then it can only be applied weakly. As always: Great video, thx

@labboc Жыл бұрын

Yep. That's why I always turn it off

@SuperEssenceOfficial Жыл бұрын

if the eye tracker will put whatever you're looking at in focus, will you even notice the blur on the rest of the scene? :D This is how eyes are in real life as far as I know. You dont see things out of focus because its in focus wherever you're looking. Depth of field is therefore more associated with cinema or photography where someone else directs your eye, but in video games you direct your own eyes ideally (otherwise you're losing player agency?) so depth of field really doesn't belong.

@ironfoot1938 Жыл бұрын

@@SuperEssenceOfficial I don't know about you, but I don't just see the thing I'm focusing on. i.e. try holding up a pencil in front of your eyes. If you focus on the pencil you should still see the background just blured. This effect also helps you understand the depth of your surroundings as it would in a game i.e. looking at a tree in front of you should blur the background heavily. Obviously it's much better for cinema or photography, because you want to have the important stuff in focus.

@SuperEssenceOfficial Жыл бұрын

@@ironfoot1938 yes the background is blurred behind the pencil, but my point is that you are looking at the pencil not the background, and when you look at the background you wont notice the pencil became blurred. The effect is just very subtle since you are actively looking at the part that isnt blurred. Sure you can probably tell from your peripheral vision. so with an eye tracker i dont think I would notice the parts that im not looking at actively. hmm would hve to see a study if people enjoy depth of field when they dont notice it or something. interesting discussion

@WhatIsMyPorpoise Жыл бұрын

@@SuperEssenceOfficial We see in VR how to adress this, and the answer is that you have it backwards. You don't blur what your eye isn't looking at. Instead, you enhance the quality of what you are seeing, with a smaller, higher quality screen that follows your eye.

@ancientpixel9809 Жыл бұрын

I absolutely love your videos! I just recently got into shaders and "But you'll notice that the only result that appears is a random comment in some code" is so accurate! Just brilliant humor throughout! I also really like the contents, your videos are very helpful in understanding the idea behind all these visual effects! (especially since I'm too stupid to understand them myself...)

@Acerola_t Жыл бұрын

It's a tough road but eventually you'll be knowledgeable enough to understand research papers and then the sky is the limit!

@RAndrewNeal Жыл бұрын

It's all good until you can only clearly see where the game thinks you're trying to look. Now we need eye trackers just to make this practical. But the eye strain would probably be unreal. But I always appreciate some good, efficient programming concepts explained at the right level of abstraction for a cursory glance. You always hit it out of the park.

@_sophies Жыл бұрын

I love the jab about how much of a PITA it is to learn anything about graphics programming, and I'm very thankful for your videos that do an amazing job of filling that gap.

@KoshakiDev Жыл бұрын

Acerola manages to mix being serious and informative, but also somehow keep the video funny. Great job dude!

@TreesPlease42 8 ай бұрын

It feels like Runescape meets SkillShare and I'm here for it 10/10

@luukvanoijen7082 Жыл бұрын

This channel is criminally underrated, the content is just sooo good. And these videos are perfect to learn from, this helped me understand depth of field so much better. Thanks!

@Lain-404 Жыл бұрын

Thank you for breaking this down! I add DOF to almost every screenshot I take in a game, but always end up fighting with the grass because I didn't really know how DOF worked. The way you explained it makes a lot of sense! I'm excited to take more photos now that I know how the shaders work :3 (also the audio error was funny, even if it wasn't intended.)

@TheMasonX23 Жыл бұрын

I love your videos, I wish these had been around back when I was more into game dev. Still really appreciate them though, especially all the nuance and care you put into things, and how well you explain them. The Karis average was a really interesting idea, thanks for bringing it to light! Looking forward to the next one!

@NikZapp Жыл бұрын

I love your videos so much! I wanted to understand graphics programming for a while and your videos are explaining concepts that I found hard in simple and memorable terms! Thanks for the work you put into making them, please don't stop!

@vanilla4064 Жыл бұрын

this is seriously cool, good job Acerola! Loved learning about the Karis Avg~ Hope to see more things like this :D

@jamesweatherwax4444 Жыл бұрын

These videos are so good. Its entertaining and provides lots of information about computer graphics. Its an in depth explanation in simple words

@implozia1360 Жыл бұрын

You are one of my favourite channels to watch and I really hope you continue! Once I am stable, I'd love to join your Patreon!

@f11bot Жыл бұрын

That monogatari style title transition 👌👌👌

@urselhorst9253 7 ай бұрын

I love u man. every time I watch one of ur videos I can't stop thinking about ways i could implement this in my games. I started experimenting with shaders a few months ago and I'm hooked ever since.

@WingofTech 11 ай бұрын

What incredible effects. Thank you!

@lucasdemo5763 Жыл бұрын

Awesome video! I sincerely hope you can keep creating such high-quality content :)

@Acerola_t Жыл бұрын

Thank you!

@UncoveredTruths Жыл бұрын

that looks great dude, good work!

@bragunetzki Жыл бұрын

I'm not even a graphics programmer, but I love your video's presentation (and how well they explain everything)

@Stunex Жыл бұрын

Great video - as always. But I really hate DoF in games :D (at least for gameplay) I think if I'm consistent with anything then it's that the first thing I do when I start a new game is to disable motion blur and dof.

@jonardon8581 Жыл бұрын

DoF and motion blur are the first thing i turn off in the graphics settings of every game

@thematicschematic Жыл бұрын

Yeah, I'm not watching a movie, I'm immersing myself in a world. I don't want to feel like I'm looking through a camera - that just breaks immersion and makes things harder to see.

@uncoherentramblings2826 Жыл бұрын

Lesgoo! New video and new cut on our boi.

@LonewolfeSlayer Жыл бұрын

Actually mad youtube didnt show me this video. Great stuff as always homie

@Acerola_t Жыл бұрын

Thanks! Not to shill but there's always my twitter/discord/youtube notifications to know when new videos are coming out

@adyss1543 Жыл бұрын

I honestly really enjoy these videos. I make Shadermods for Skyrim myself(with ENB) and these are great to learn new stuff or get new ideas. Ty for making them♥️

@xanderlinhares Жыл бұрын

This has quickly become one of my favorite channels. Patreon incoming

@rustyshackleford2605 Жыл бұрын

13:09 That music hit me right in the feels. Such a good game. Anyway, thanks for the very interesting video! It's amazing how much thought has to go into visual effects that we take for granted when using an engine like Unreal where everything's just a slider.

@ryu_lidu Жыл бұрын

Insane content as always

@ninjanolan6328 8 ай бұрын

1:46 You have it the wrong way around. As the aperture gets smaller, the light becomes more focused. The bigger the Aperture, the more blurring there is. Low F-stop: large aperture.

@hughjanes4883 Жыл бұрын

I just realised, the arrow in the thumbnail points to nothing, this common in clickbait videos. BUT the videos is about blur, thus the arrow pointing to "nothing" POINTS TO THE VIDEO CONTENT! Very smart

@emorial.mp3 Жыл бұрын

is 4:39 not supposed to have audio?

@luna010 Жыл бұрын

thank you for the video, aceroller

@TZerot0 Жыл бұрын

So as a photographer and someone very interested in optics, I hate DoF in videogames-why? Because the human eye doesn't work like a camera lens and doesn't really have a depth of field in the same way. The inclusion of DoF during gameplay might be cinematic, but it's not naturalistic and immediately takes me out of the game.

@Cheesecannon25 Жыл бұрын

Human eyes most definitely have a DoF, it's just wider

@TZerot0 Жыл бұрын

@@Cheesecannon25 hence my language: "doesn't really have depth of field in the same way" Furthermore human perception isn't limited to the physical restrictions of our eyes, and we most certainly aren't experiencing anything remotely similar to a camera lens's DoF

@Acerola_t Жыл бұрын

Yeah this is why I specified cinematic, games will probably never be able to replicate actual eye rendering because it will always feel disconnected from your actual eyes (until we have like brain attachments or something to detect your eye focus brain waves or whatever). I think using depth of field in first person is a bad idea, but cod modern warfare 2 did it really well imo

@wolflight25 Жыл бұрын

@@Acerola_t PSVR having eye tracking that allows for foveated rendering could make a super interesting DOF effect for games, although as its your own eyes being tracked, I guess if you got it just right you would never actually notice it. I dunno maybe you would, at least others watching you play would be able to notice more often where your attention is.

@FinFET Жыл бұрын

Such an amazing channel! I'm from Brazil and used to the acerola berry, but calling yourself Mr. Rola in portuguese sounds really funny 😅

@MatheusPratta Жыл бұрын

I agree, the moment he called himself Mr. Rola I started laughing myself so hard, oh man, 5th grade vibes still going very strong years later

@PDihax Жыл бұрын

Man. I would die without knowing why he cant legally tell us about the Karis Average

@l3gacyb3ta21 Жыл бұрын

me too

@lariozavc7828 Жыл бұрын

this vid is really interesting i really loved how you expaling them code to make said sense to me at least good job dude keep up the good work

@DKarkarov Жыл бұрын

I Karis a lot about this video, it has brought a real bloom to my screenshot game. Your timing for this video to go with the algorithm is also quite above average. The depth of your content is astounding.

@Hipernt Жыл бұрын

4:39 "I love game. And I don't like it when Game is not what gAmE says; THis game is the game"

@Meteotrix Жыл бұрын

awesome lesson! But I have to say, I personally kinda hate DOF in games so much, probably because practically everyone does it wrong. I used to hate motion blur too until everyone got better at using it °w° Subtle and relevant tends to work better I think :3

@MrGoodKill_FR 4 ай бұрын

Excellent video as always :). Also, late to the party but for what it's worth "Next Generation Post Processing in Call Of Duty" mentions the Karis average!

@hoisamuro 6 ай бұрын

I love the monogatari style editing, love how that show used typography (graphic design nerd).

@iurra Жыл бұрын

Thanks for one more vídeo sir acerola 😀

@polarsbear668 Жыл бұрын

Keep up the great work!

@tsun8267 8 ай бұрын

i usually never comment on youtube but i just want you to know this channel is a godsend for game artists especially for those that like the technical side of things

@mitchelljeffery3003 Жыл бұрын

Top tier outro 😂😂😂 great video mate!

@alexanderhuliakov6012 Жыл бұрын

This is the best channel on graphics programming, I swear...

@FROZENbender Жыл бұрын

kickass video. I thought dof was a trivial effect, didn't know how much there was to it. I'd have loved to see a star kernel for the bokeh blur. seems like that's what my eyes see from street lights at night.

@infokubarcade Жыл бұрын

Hey mr Rola. At first i wanted to make a joke bc half of the time im in orthographic. But i'll be serious for a minute. It's been a while since im looking for pros making content for pros, with high tech and precise explanations. You are definetely one of them. Amazing content. I'll definetely be part of the Patreons club and i wish you the best for becoming a full time video maker. This platform is lacking so much of ppl like you. Peace !

@tkasch2505 Жыл бұрын

Very cool video, as usual

@radicant7283 Жыл бұрын

> see 15 min video about dof > I ain't watching all that > name looks familiar though > oh shit it's that guy! > watch the whole thing Excellent and smart as always my dude. That inverse firefly suppression is so slick.

@ShiroCh_ID Жыл бұрын

you meant that FFXIV Guy??

@torphedo6286 Жыл бұрын

Thanks for uploading :)

@Nylnezz Жыл бұрын

ho man acerola we need you more than ever Gshade did a BIG fucky wucky xD

@Acerola_t Жыл бұрын

my stuff works just fine with reshade if you decide to move

@Nylnezz Жыл бұрын

@@Acerola_t i probably will in the future for now the built in nvidia filters works just fine

@LambOfDemyelination Жыл бұрын

what's that moment of silence at 4:30

@mktj1 Жыл бұрын

love your content

@ro-ce8vg Жыл бұрын

4:41 muted audio or am I stupid

@goosewithagibus Жыл бұрын

This information is extremely cool.

@RetroMMO Жыл бұрын

Thank you Mr. Rola

@crow4277 Жыл бұрын

new acerola LFG your videos are so amazing edit: watching this i'm realizing that my own script that im writing for a video on music theory and physics is actually accidentally drawing on your style and mannerisms whoops

@Acerola_t Жыл бұрын

new acerola looking for group Thanks! and no worries, imitation is the sincerest form of flattery after all. I'd be lying if I said I haven't drawn heavily on creators that inspired me.

@neo-giu Жыл бұрын

It'd be nice to see an anamorphic version of this

@Shrewbloom Жыл бұрын

the legend is back

@isaipack Жыл бұрын

Another great video. This video itself could be a final project for a computer science degree. Easily.

@abenezer210 Жыл бұрын

Thank you Acerola.

@Walamo Жыл бұрын

i love you. this is awesome. now i'm gonna tweak my skyrim ENB

@AnnisVeryGoodGames Жыл бұрын

lol the arrow with "transparent" background is absolutely hilarious.

@fray9441 Жыл бұрын

"what the fuck is happening dear god" -me, throughout the entire video

@vgchronicle Жыл бұрын

I always thought DOF in video games was very basic or not existent. But there is actually more to it. Good explanation and idea.

@Magnogen Жыл бұрын

I will use Acerola Mapping in my next video game

@chowder130 Жыл бұрын

I've been around KZfaq long enough to recognize channels that are about to hit exponential growth. Buckle up, Acerola.

@planetrenox Жыл бұрын

Video idea I'd like a lot: Discuss image effects that would go well with unlit scenes.

@ruycalderon8507 Жыл бұрын

You are a legend mate

@Cookieglue Жыл бұрын

Acerola uploads again. Perhaps we do live in a good world after all.

@medul8039 Жыл бұрын

thank you acerola

@RedhadesMtl 11 ай бұрын

This answered a lot of DOF questions I had.

@Acerola_t 11 ай бұрын

Thanks so much!

@Meow_YT Жыл бұрын

The other thing missing is the double-vision effect when focusing on different depths. I think that really needs stereoscopic vision and fast eye tracking though. Even probably some way of determining where the eye is focusing.

@Arcangel0723 Жыл бұрын

I feel smart now yay. As soon as you mentioned standard dynamic range and high dynamic range I thought "hmm, sounds like a 1/x sort of problem".

@fatfingersman Жыл бұрын

New Acerola video PagMan

@kpdelaney6460 Жыл бұрын

very fascinating

@charleslemaire2329 Жыл бұрын

your voice is missing at 4:39 O_O. else than that, high quality content as always :cheer_cat:

@battmarn Жыл бұрын

DoF goes on for screenshots but off for actual gameplay for me. I can't deal with things I'm trying to focus on with my eyes being blurry

@eXca1iburN Жыл бұрын

~13 minutes you credit people in your discord for contributions to stuff you could have claimed. That's pretty lovely, I hope you don't ever lose that humility - I really enjoyed the vid 😊

@jaimepericas5720 5 ай бұрын

your videos help a lot! thanks!!!

@E1nsty Жыл бұрын

Pretty sure that an open aperture results in strong depth of field by shortening the focused range. A simple pinhole camera has near infinite focused depth range. This means in photography it's always a tradeoff between the amount of light hitting the film/sensor and focused depth. More light means less noise and allows for shorter exposition which limits motion blur, but at the cost of having to be precise with the focus. The lens moves to shift the focal plane, this also affects the absolute distance that can be considered in focus as focusing on closer objects makes the focused depth range approach zero. thanks for the vid

@oliverlong345 Жыл бұрын

My god he wasn't lying about the Kari's average. I guess I'll just have to sub and watch all his videos to learn graphics programming.

@ChristopherCricketWallace Жыл бұрын

this is fantastic.

@lolotronop Жыл бұрын

Monogatari references and music from Sonny Boy on a computer graphics video? I'm 100% sold, degenerate brain happy, compooter loving brain happy, me happy, subscribed

@ianrussell4650 Жыл бұрын

Respectfully, DOF will still be the second setting I turn off in every game I play. (It looks pretty but obscures POIs and enemies)

@Acerola_t Жыл бұрын

In the event it obscures important information, that is a fault of the designers not the effect.

@MarshmallowBoy Жыл бұрын

I was thinking, this looks like shit, and then you said "now I know what you are thinking, Acerola, this looks like shit"

@nix3l_ Жыл бұрын

hey, love the videos. i was wondering where you find the papers you use. is there a reference or a certain place you usually look, or is it just googling and hoping you find the right thing?

@Acerola_t Жыл бұрын

Usually I do a lot of googling. I also look through the table of contents for every gpu gems/pro/zen book to get real world implementation details, and I'll watch gdc talks and siggraph talks for ideally the most up to date tech. Often all it takes is one good recent paper and then you can go through all their references, for this video I was having a hard time finding good resources at all until I read the gpu zen article which then referenced a few other papers which were great.

@nix3l_ Жыл бұрын

@@Acerola_t thanks! keep up the great work!