How many AI Agents can Unity handle?

Let's see how many NavMesh Agents Unity can handle! That's right, another excuse for making a huge simulation ;)
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♪ "Dress Code_ Black - oomiee" by Epidemic Sound (www.epidemicsound.com)’

[@blenderguru]

That's so cool. I've never used Unity, but I'm impressed at what it can do.

[@lukerichards4142]

Witnessing two of the most smiley and personable teachers (A.P. for 4+ years) online sharing some love, yeah I'm going to say it. It's made my day.

[@FoleyX90]

Heyy! I love your blender videos. I use them to make models I end up using in unity :) You and brackeys are my 2 favorite 3D youtubers so it's cool to see this

[@matsmith2507]

Better late than never... Thanks to you sir that I tricked my cousin into thinking the donut I made was real (due to low phone brightness lol). I'm hyped again :)

[@shaanig466]

Guru bro, thanks for introducing Blender for me.

[@Micha-we2eq]

If andrew would make models for brackeys' games, they could make something truely epic

[@RaoulWB]

3:05 We've basically gotten to fluid simulation at this point

[@icedchqi]

yeah but fluid simulation probably has less water units (and I understand I'm starting to fade away from the joke, so feel free to woooosh me)

[@masterofyee1738]

Icedchai plays w o o o s h End me

[@icedchqi]

@@masterofyee1738 thank you *dies*

[@richardtan4844]

That actually is a really good point, since fluids always look for the path of least resistance, exactly what these agents are doing

[@icedchqi]

@@richardtan4844 oh i just thought they were just a bunch of vertices which follow physics sims.

[@MaeveFirstborn]

This. This right here. This is what I want to see. Not only tutorials, but just random simulations and experiments.

[@EnriquePage91]

Yeah? If u guys really like this type of content I'm gonna be opening a channel soon that will have lots of that - I'll keep you guys posted through Brackey's videos!

[@SunnyApples]

A second channel for casual content. Some of us are here mostly for Unity Tutorials. This video was good, it made me realize messing around with this stuff can be fun. :D

[@EnriquePage91]

Sunny Apples you have no idea how fun t can be. It can be so fun sometimes it fucks me up that I have to stop because I'm not getting paid for messing around LMAO

[@arattactician5697]

Enrique Raphaël Page Pérez Uuuh don't. Self advertising is annoying... this one comment is enough, thank you.

[@EnriquePage91]

s1601019 I'm not self advertising I just don't have a huge team behind to do research on my behalf on a more professional manner so I'm trying to sense what the interest for something like this would be. As I mentioned before it takes a long time to do stuff like this so if remuneration is out of the possibilities after a certain amount of expected invested time to gain an audience that would render the channel sustainable, then it would be hard for me to consider the possibility of not only investing my time into doing the coding and art for the channel but then also drowning myself in hours of editing for the videos. I don't mean to self advertise at all, I have 6 votes here so I doubt if that was the goal I would consider the attempt successful - I do however have to somehow let the people interested on this type of content somehow that it is out (once it is), putting one or two comments on channels related to this isn't gonna hurt anybody and if people are interested on the topic the likes will have to gain relevance for the comment to pop up anyway - if they don't no one will see it anyway so I don't really see the harm done unless the content I end up making is bad.

[@TheNewGeneration-wh4kr]

Me:*Drops food* Bacteria: 00:00

[@KeloMellow11]

Its time for a fricking crusade

[@niconic420]

Forgot the 5 seconds rule

[@physbrywha]

Apollo CB it takes 5 seconds to get there

[@Alvionalx]

Gamerkid2010 Fu-

[@hogbmain]

Do 4:42

[@sykoo]

Oh my god that ending! It's actually surprising that Unity can still handle 5000-ish agents all seeking their path without colliding with obstacles, and run at "playable" FPS! Nice job on the video, it's fun to see where the "limit" appears, and how we can go around it, tweak more settings, and get better and higher results out of experiments. =)

[@CodeTalkerLooter]

yo syko you are a machine at posting things in your discord

[@pedrovitor4813]

#Discordsquad

[@flashgames1273]

DO A COLLAAAABBB PLSSS

[@albingrahn5576]

Can you two do a collab or something? Would be really cool

[@pucie_boi]

Damn I just came from your channel... then I wiped myself off and clicked on this video

[@jeangodecoster]

The path is calculated at the start though, once it's calculated, there's no pathfinding going on anymore, so the only thing you're dealing with here is rendering and collision avoidance. The real test would have been: what happens when I give those agents a new destination every second

[@TheEllord33]

What if these agent was playing hide & seek. Recalcul path finding every movement.

[@jeangodecoster]

@@axelestial there, fixed :-)

[@jeangodecoster]

@@axelestial i guess they changed positions

[@MayankKumar-gn1zx]

That's why they clog up at one point instead of going through another... I believe that the an AI Agent should partially treat other AI Agents as walls. It should make a calculation for how long it will take to clear up and if it finds a faster route with less traffic, why not...

[@GameDevNerd]

@@axelestial OK, Billy Madison 😄

[@AA-xd9py]

The end was actually beautiful

[@gamedesignwithmichael]

(tears up) so much financial independence....(sobs)...it's beautiful.

[@chrisfoster6756]

The most magnificent ending to a project I have ever seen. Bravo, my friend, Bravo.

[@clanderson0]

How many can Unity handle? More like how many can your PC handle

[@Xperto_]

The enginge might bottleneck at some point

[@zentergames1622]

that's right

[@callofdutymuhammad]

@@Xperto_ It wouldn't because it's developed by competent programmers. Unless there's some sort of memory leak most REs handle scaling well.

[@Xperto_]

@@callofdutymuhammad I said it might. I can't say for sure how it has been programmed, I don't have such an insider information

[@mason3872]

I have 14 gb of ram so my cpu might be ok for a while until the end when my my cpu just dies

[@zera555]

Brackeys truly is the Bob Ross of Unity

[@LookAtEachOther]

Omg you're right.

[@chepulis]

Hundreds of wild running horses running from a giant duck

[@dawgy3937]

YES

[@muramasa7537]

😹😹😹

[@bibasik7]

*100 duck-sized horses running from a horse-sized duck.

[@jazzscott9109]

Latex-clad Nuns on horseback wearing custard filled waders and firing paint guns chasing dwarves through fields of giant mutating hallucenogenic plaid mushrooms to Pink Floyd music

[@OldLightniteProductions]

Wow, your Imagination! DAMN!!!!!! (Seriously damn)

[@CodingKricket]

5:11 Brackeys: Horses Me: Super Pickles flying through the maze!

[@akt9549]

Not pickles

[@akt9549]

Cactus bro :D

[@TsetTsyung]

[sniff] Them feels at the end, man... the way they all ran... together [breaks down]

[@julianmiranda3130]

Michael Duxbury 😭😂

[@engieknight]

0:12 me n' the boys going to get pizza rolls

[@bigbodybob9354]

Your computer slows down at 5,000? Mine probably slows down at 5

[@arvintis2293]

ProCreeper 2000 Anywhere I can find his build? Just curious

[@inkoalawetrust]

Mine can't even run Unity.

[@MauveDash]

mine will slow down with 2

[@rygerryger]

ProCreeper 2000 Do you know the specs of his computer? Or where to find them?

[@guldberg75]

kzbin.info/www/bejne/bqvSZpSVhtt9qs0 @ 4:46

[@pikablu1272]

So... Tic tac running through big mazes?

[@EthanPlazYT]

*B E A N*

[@kurekureci]

The end was actually impressive.

[@FoundationsofPause]

and tanked performance. game design over visuals everytime, folks at home.

[@pkn8707]

I dont know much about game development but the way you combined AI and game development so smoothly is really impressive

[@Waffle4569]

As you'll find, separate mesh renders are the biggest killer of performance. To achieve optimal performance, you'd have to combine all the agent meshes into one giant mesh, and offset their positions using shaders. kzbin.info/www/bejne/qInUfKhvqqhjnJY This takes the load off the CPU and puts it on the GPU where it can handle large volumes much better.

[@VeNoM0619]

This needs more upvotes.

[@ConnorLinley]

kk, ill upvote it for you. mostly French to me tho.

[@videoguy640]

I wonder if this is what the total war series does

[@Waffle4569]

videoguy640 I can’t speak for Total War, but as an ex-ArmA modder this sort of optimization was heavily utilized in large terrains. Static objects were dirt cheap because the cpu didn’t have to work on them individually. Even things like vegetation wind animations were done in shader for performance. Unity’s batching attempts to do this automatically, but does it very poorly compared to manual.

[@KuraIthys]

I would assume something of that sort is likely. Of course Total War has it's own engine, so unity's limitations aren't exactly relevant. I'm sure the Total War devs focused a lot of attention on optimisation of large groups of AI units, given the nature of those games...

[@blakeschmitt3464]

awesome, I've been having so much fun learning about Unity and game development with you!

[@OmerSaidtr]

That random ending killed me :D

[@roadkillscjim]

CC on 0:14 "I'll be putting nudity's building AI solution to the test" ahahahahahaahah

[@The7azem]

hahahaha

[@game-guy]

hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha

[@someknigt10guy22]

I don't get it

[@someknigt10guy22]

O wait the closed caption nvm

[@evediggory5730]

I was doing homework but you uploaded

[@JD_Mortal]

To get more realistic movement... 1: When an object is at a location, give that location a "resistance increase". 2: After x-time, recheck for new paths, randomly, using the "resistance" along paths as a modifier. Why add resistance? Too crowded... People avoid crowded locations, even if they are faster paths. Thus, creating a virtual "resistance", which we add to the new paths we select. We commonly take the path of least resistance. Why after x-time, and why randomly? Well, partly for speed, and partly because as others move away, some areas which were NOT crowded, will now be crowded, and other areas which were crowded, may now be vacant. In time, it is faster to recalculate than it is to cross-check each objects "path" to determine the resistance. However, for a true movement sim, you WOULD pre-calculate paths to a certain distance. Then each new moving object would take that resistance into path account, and just recalculate around it. However, that is like mind-reading and meta-gaming AI, that is artificially telepathic. Real people collide first, like they are in denial, or all running for the exit... Then, after getting jammed-up, they try to move away, while later followers who see the congestion, would normally pick another path before hitting the congestion. Stacking resistance sort-of adds like increasing "time to destination", or "length to destination", which should appease the AI that is controlling the motion. (Make "empty nodes", that have a diameter value and a resistance value. Setup in a simple grid, or even just tied to each moving object. Both should work the same, but being tied to the object will use less and be more accurate.) Optionally... Before a collision... If any object is approaching another object, it would normally slow-down a bit, so it doesn't collide. (Unless there is a fire... Then they would trample one another.) That requires a check for objects within x-range, but only within x-angle of the direction it is moving. Otherwise both objects would slow-down, if you didn't make sure only the one behind the other object slows down. Unless they are both headed towards one-another... Like at an intersection. Then you do want them to slow-down, for better collision detection and resistance-stacking, so others avoid that new congestion.

[@kaangamgimginnkagnagnkingmngkn]

The end was actually splendid, this is the best thing I've ever seen therefore.

[@JJNincorporated]

This is the exact solution I've been looking for. I couldn't find it anywhere else on the internet, and now my game is possible. Thank you!

[@Jasperkiller1]

I can actually watch those agents run for hours

[@FlamingNinjaBoi]

Having been a gamer for decades, it's interesting to see 'the other side'. Like when people talk about whether a game is well optimized or badly optimized, it's often just people being pejorative without any logical evidence. Getting see what 'optimization' can look like is super neat. Like when you solved the massive CPU usage problem on rendering.

[@SixxFox]

This is just way to satisfying to watch

[@entreato]

Maaaan, this was the MOST FUN Unity video I've ever watched! And what a breathtaking ending! :) Thank you.

[@thajinahmed]

5:18 - THE BEST PART OF THE VIDEO... And Peaceful And The Video is Very Good, Like What's new In That because All Your Video are Super Cool! Thanks bro!

[@Nerdfightarial]

Backeys: Have fun doing game development! Also Brackeys: So I made a detailed spreadsheet.

[@Nebulaoblivion]

Spreadsheets rock!

[@HamzaKhan-cb4he]

Wow! Better quality than already AWESOME quality and a cool ending lol

[@scotmcpherson]

So the reason for the order of which units moved first is it's hierarchy position. For each process cycle, the units at the top of the hierarchy process first. You just created the back row first, then duplicated the rows toward the front. When you forced all paths to be calculated first, you sped things up a bit by front loading a lot of the processing, however the units still moved in order because that next step in the process would still be based on position in the hierarchy.

[@RichardPupRoo]

Video: I'll be putting Unity's building AI... Subtitles: I'll be putting nudity's building AI What the hell?!

[@Vienesko]

This is good to know because Im currently working on a project where I need 800-1000 Agents simultaneously and individually wandering around but on several levels and most of them are mostly out of view (but they have to keep moving). Now that I know, that only the rendering is the limit I am very positiv, that that will work in the end. Thank you for your great tutorials. :-)

[@457Deniz457]

we love you :D

[@brucecampbell9240]

John Lennon Imagine

[@bytecrafterlp605]

457Deniz457 o

[@gms_tristan893]

457Deniz457 I

[@davedogge2280]

Also War Horse approves of this video.

[@SeanATron-vr8eb]

no

[@samre3006]

I had a smile on my face in the end. Great. Thanks.

[@DerpyNub]

Dani: *This makes me go YES*

[@ILoveThisGame778]

You are amazing. I started watching your tutorials a month ago i guess and today i published my game made by following your tutorials. Its a simple game but worth alot for me. Actually i followed your tutorials and blackthroanprod tutorials but majority were from your channel. I don't know how and why KZbin was showing your tutorials related to my current problems about game and you were first on KZbin who's videos were help for me. I am so excited to share that game with you guys but i don't think its good idea to share link here. Anyway thanks buddy.

[@ILoveThisGame778]

I am sorry i can't stop. play.google.com/store/apps/details?id=com.ARQI.SpaceSurvivor

[@Canthandlethis4296]

Come on... I should be doing my homework.

[@doublesystem9790]

You can't escape the horses

[@Henrix1998]

You are not the only one

[@matteobaldini9837]

The best thing for me is that this is my homework.

[@sethmoneygetter]

probably more educational than what u did

[@MrWhoever]

Please create more videos like this! I'm not looking for tutorials, these are so much interesting!

[@Wintershot]

Would have been interesting to see the AI comparing individual paths to come up with the perfect swarm pathing

[@ekzac]

I loved that horses running through the flat cubes right to the sunset without sun in the big flat plane! So beautiful! :')

[@wookatsun25]

5:19 Leaked Red dead redemption 2 ending

[@Sun-Tzu-]

Would have been a better ending...

[@zaidlacksalastname4905]

Aged like wine

[@zaidlacksalastname4905]

@@Sun-Tzu- as great as it is, general, I'm gonna have to say no

[@wookatsun25]

@@zaidlacksalastname4905 True, didn't even remember leaving this comment too

[@alanreiley]

I love this stuff and I am also very impressed with your thought processes on making it run more fluid-like. Thank you! This was great entertainment and very educational.

[@stu6949]

0:15 captions on I'l be putting nudity building AI Solotion to the test LOL

[@yeppiidev]

Lol

[@balayogam]

Excellent video. Wonderful ending. Loved it.

[@arbigjylbegaj]

I love that he specifies things like "I also turned off V synx in the graphics settings" so that we also learn stuff like the fact that V sync can be found in Unity s' graphics settings while watching the video for enterntainement.

[@miki_mao]

Amazing video! Always have found agents fascinating too! Very inspirational video

[@barmetler]

This video is so powerful.. i'm in tears

[@AK476056]

Amazing video. Your channel is great. I want to learn how to do this!

[@joslatbarcelona]

Clap Clap Clap! that was original, refreshing and pure fun! - Thanks :)

[@Oxmond]

Crazy video...and that ending! 🤓😂

[@themerpheus]

you should try c# job system for this.

[@khaledmkhawad1]

Any implementation ideas ?

[@Enteriosoft]

WOW!! That beautiful ending... Can you please make a tutorial on how to achieve that graphics.

[@transgenderhera]

God I miss your videos Brackeys

[@LolFishFail]

Currently debating whether to use Ue4 or Unity for an RTS strategy game, I have way more knowledge about Ue4 but Unity appears like it can handle more agents. Does anyone have any suggestions as to what I should go with?

[@Itsysss]

Man I miss Brackeys 😔

[@diliupg]

This short video is so resourceful even in 2021. It answered many of my questions before I started coding the AI in my 3D game. Thanks Brackeys(Asbjørn Thirslund). May you be well. :)

[@utpalsavaliya761]

0:14 Even though it is not automatically translated, the captions say Nudity's building AI solutions, instead of Unity's!

[@Ibrahimhaxhiu]

It's auto-generated

[@utpalsavaliya761]

@@Ibrahimhaxhiu Nope, I am not talking about the "English (auto-generated)" ones, but the ones labelled just "English"

[@melomaniakjm]

You are just amazing! Thank you so much for this video it was jubilating!

[@goldcobraarima9819]

Awsome video, can you make more videos about AI? An did u made the hores by yourself and their movements? I think thats a rlly interesting theme :)

[@kersh8568]

GoldCobra/ Arima it looked like the free horse package you can download from the asset store, I'm not 100% sure though.

[@goldcobraarima9819]

Eric Kershner ty man :)

[@adamsmith2054]

That was the funniest spelling mistake I have seen in my life.

[@buracadorin]

You're comment made my day :))... I think the Horse model is: Horse Animset Pro, made by Malbers, you can find it on asset store ;)

[@lolpop7799]

GoldCobra/ Arima i still dont get why people are calling these things ai. Think about it they arent really artificial *intellgent*es i cant spell it xd.

[@nachiketdhamane386]

0:14 Barckeys :- unity's building AI solution 👍 Captions :- nudity building AI solution 😂😂

[@jaybenton7716]

Isn't this where the new Job System would come in? In the talk I watched, they managed to get thousands of AI moving with very little slowdown.

[@Ziplock9000]

Exactly

[@vlord47]

Very nice video. I did not know how simple pathfinding was.. Tryna implement myself now! :D

[@antideadmeme8057]

Next vid: *how many unity's can A.I agent handle*

[@tomtomkowski7653]

2:00 - most important info and conclusion is that Unity Navmesh sucks when only about 300-400 Agents can actively searching for a path at the same time. This was only working because you precalculated all the paths, which means it wasn't real testing and only what was tested is the GPU power to render so many agents.

[@BRM5Guy]

Me: I got the horses in the back The horses in the back:

[@JohnDoe-fv5cu]

This is just brilliant! Especially the horses :D

[@rubendreyer8179]

My pc would lag on 100 agents

[@elcio-dalosto]

man... you are insanely good at what you propose to do. Congrats!

[@verminrodent2567]

Wouldn't Brackey have been able to use way more Agents if he made them cubes instead of capsules?

[@BlackMesaEmployee]

pyramids work better

[@Freedster]

His data showed it only increased FPS by 4. Despite seeming much more complex, the capsules aren't actually that bad.

[@SlyGuy]

Thanks you so much for making so much test on unity and save us so much time! So much of everything! ;)

[@jayking3063]

👏 that was a perfect ending 👏

[@spacereceiverUtube]

Very cool! But I've been waiting when you gonna optimize agents to make them not to queue up when you make them find alternative ways. Would be cool to see them trying to find the way while they are running

[@CabbageSandwich]

*plays El Dorado theme over ending sequence* *sheds manly tear* *goes back to solidworks assignment*

[@GameDevNerd]

If this had been some complex terrain with trees, rocks, water and other complex variations, AStar would blow Unity's built-in system out of the water. And you already saw a couple problems with it: it searches for a path in the background, they start one by one (synchronously) and there's a delay: agents don't respond to destinations/goals quickly. In a shooter or RTS game this is fatal, and once you've got a lot of stuff going on in a complex scene and 200+ agents they'll sometimes be sitting there for 2 to 5 whole seconds (or longer) after getting a new destination and doing nothing. You'll think it's your code but it's literally just how that basic navmesh system works. That's why AStar Pathfinding Project is so popular. Don't get me wrong, AStar has some issues too. For one, he does a lot of temporary array and list allocations in his code that generate a ton of garbage that gets bad after the game runs a long time and there's hundreds of agents. We had to rewrite portions of it to make it stop stuttering and lagging. It's also kind of complicated. But in a similar scenario, the Unity system would grind to a halt. AStar at least runs on multiple threads and takes advantage of multicore systems. So the capsule AI and cube world test is very deceiving. Make a big terrain with a lot of irregular features and try giving agents orders at irregular intervals and you'll see the problems start to surface. Things like this are what I want to see Unity's teams working on in the future to give Unreal some more formidable competition.

[@Natalynn]

@Brackeys, What about the Job System? Apparently it can handle 10's of thousands entities or more.

[@PMSTTR]

Natalie yes please. We would like to see a video of job system

[@armpap1]

100.000 of individually animated AIs that do a lot more than just running - around at 30+ frames per second.

[@UltimateQball]

I really liked this video!! Now I have a better understanding of Unity's limitations

[@opalthediloalt9595]

5:25 So beautiful, so amazing, it’s beyond beautiful, that is how all movies with good endings should end, with 1000000 wild horses running into the sunset, beautiful! Just beautiful

[@kevinlel1792]

No, running *into* the sun

[@opalthediloalt9595]

Kevin lel ... works

[@Luckydrg]

You are amazing. I just started to learn Unity (yesterday) and I love this simulation!!!!

[@taisu4913]

When you have watched Brackeys for about a year and realize you have not subscribed ಠ_ಠ

[@chickenmag1657]

≈•÷•≈

[@UberMassiveGaming]

I think a lot of online unity a* solutions available use a square grid for the a* graph, giving them way more nodes than is necessary. Versus the a* navmesh unity generates being much more “polygonal” and spread out. So there still may be a way to build a more performance effective pathfinder than the built in one.

[@alexbrandt]

I'd love to see a video of this same process put in the ECS/Jobs system. I'm curious how many agents can be managed with those improvements

[@minecaftgamer4206]

never thought a brackeys video could have such a happy ending. beautiful

[@lizardsempire5770]

This video just made my day!🤩🤩

[@mutmut02]

So much fun at the end :') Love your channel !!

[@invisiblescout]

A whopping 10 agents (Refer to thumbnail)

[@kroutonjr]

one of the cool things with a* is that yoiu can add in a heat map which makes the ai look for more alternative paths if they see alot of units are going down a particular path.. its really useful for tower defense games

[@wuznab5109]

May I ask what plugin you are using for C#? I would love to do the same with mine.

[@RaebEeffoc]

Haha, this wasn't quite what I was looking in my search but very entertaining to watch so many little AI's.

[@jeremydiaz9642]

Imagine this. With many AI Agents, in a real unity 3D game, you can simulate perhaps thousand amount of Zombies or whatever you prefer chasing you. *_Who else thinks this sounds amazing?_*

[@ResurrectHD]

ディアスジェレミー Checkout “They Are Billions”, it’s an RTS game

[@isTreeTProductions]

One of the most awesome Unity videos i've ever seen :D

[@voidofspaceandtime4684]

Hunt down the mazeman

[@EriksGarbage]

I want this to be a screensaver >Get computer power of a server >Make the 10k simulation. >Run it. >When they reach the end, turn camera and make them go through the other end. >When finish, turn it back and start from step 3 (line 4)

[@jrmorrisjr1471]

The ending brought a tear to this Texan's eye.

[@Jhenoah]

Nice vid. Seem pretty good with Unity, too. Congrats.

[@pcdoc_nanda]

Do more videos on AI

[@mcorrade]

very cool. I was hoping for cactus riding horses into the sunset but hey yours was better :) Man I love being at the start of A.I.