Unity의 VFX 그래프와 파티클 시스템 비교하기

주요 요점은 VFX 그래프와 파티클 시스템이 용어와 기능 면에서 많은 유사점을 공유한다는 점입니다.

### Unity에서 VFX 그래프와 파티클 시스템 연결하기
* 🌌 Unity의 VFX 그래프와 파티클 시스템은 **GPU를 활용**하고 파티클 시스템은 **CPU를 사용**한다는 점에서 몇 가지 주요 차이점이 있지만, 용어와 개념은 비슷합니다.
* 🔧 두 시스템 모두 **파티클 스폰, 루핑 및 지연을 유사하게 처리**하며, 일정한 스폰 속도, 버스트 및 기타 방출 유형에 대한 옵션이 있습니다.
* 🎨 수명, 속도, 크기, 색상과 같은 **초기 파티클 프로퍼티**는 생성 시 설정되며, 이를 위해 '파티클 초기화' 블록을 사용하는 VFX 그래프가 사용됩니다.
* 🔄 파티클 시스템과 달리 VFX 그래프는 **'파티클 업데이트' 블록에서 시간에 따라 파티클 프로퍼티를 업데이트**하지만, 최종 수정은 **'출력' 섹션에서 수행**하여 퍼포먼스를 향상시킵니다.
* 🌐 파티클 시스템은 원뿔이나 구체와 같이 미리 정의된 모양을 사용하는 반면, **VFX 그래프는 파티클 스폰을 위한 모양을 보다 유연하게 사용**할 수 있습니다.
* 💻 VFX 그래프는 GPU와 직접 통신하므로 **파티클 시스템에서처럼 여러 머티리얼을 생성할 필요가 없으며 셰이더에 직접 액세스**할 수 있습니다.
* 💡 VFX 그래프와 파티클 시스템의 유사점과 차이점을 이해하면 개발자가 **두 시스템 간에 전환**하고 다양한 시나리오에서 **각 시스템의 강점**을 활용하는 데 도움이 될 수 있습니다.

And this is actually one of the most requested videos. How do I convert the effects from VFX graph to the particle system? And the idea with this video today is to show similarities between these two particle systems and how you can translate your knowledge from one particle system to the other. Personally, I always recommend newcomers to first learn the particle system. It will make your life easier. I actually have these two courses that will definitely help you out get started, but recently I've only published the VFX graph tutorials and courses, and that's actually when many people began asking how do I convert the effects graph to particle system or this version one of the major difference between VFX graph and the part consistent besides one using the GPU and the other using the CPU is the fact that one has everything exposed all its models. They are all there. You can see what everything does and test it out out of the box while in VFX graph that doesn't happen. You have these four major blocks, and each one can have

several models that you need to search for and even specific models by region. Each model can receive a different input and work in a different way. So yeah, it gets wild and visually. That's a major difference. We went from having everything exposed to now having everything on a drop-down menu. But what you really need to remember is that the terms, the terminology, the keywords, they are all the same between VFX graph and the particle system. So let's actually see a few examples and how you can close that gap between VFX graph and particle system. And you will see many similarities between them too. Just a quick shout out to our sponsor today, which is Unity and the Unity Assets Store. From time to time, has these huge sales, which are really awesome for us developers so we can get quality assets or tools that kinda help speed run certain parts when developing a game. This time we have the spring sales, so make sure to check out the link I left below. I'm sure you will.

find tools or assets that are useful with a good discount. So on this scene, I have the exact same effect, which are some Sparks. The one on the left, the orange one, is done with the particle system, and the one on the right is done with VFX graph. On the left part consisted on the right VFX graph, the Sparks that are done with the particle system. They have two particle systems, one for the Sparks and another one for the flyer, which is this little part right here. The same thing is happening on VFX graph. We essentially have the Sparks, a particle system for the Sparks, and then another particle system for the flare, that little bright spot in the beginning. Then on the particle system side, this is continuously spawning particles because the looping is turned on on the particle system, and it keeps on spawning particles because we have animation a rate over time, 50 particles per second. The same thing happens in VFX graph. If I go here to the Sparks, we have the spawn block up here.

has a constant spawn rate of 75 particles per 
second, but if we select the spawn block, we also   have the loop duration and the loop count option, 
then the delay, which basically are the same things,   we have here duration, looping, and start delay. We 
just can't control the loop count or many times it   loops, and same thing happens in the effects graph. 
We could have different types of emissions, like a   burst, for example, which is essentially exactly the 
same thing as this burst down here in the emission   model of the particle system. So that's how we 
take care of the spawn, the emission, the looping,   the delay, but now let's see how we control the 
particle from the beginning whenever the particle   is born. As you can see in the particle system, 
we can set a start lifetime, a start speed, which   is random between 2 and 20, and then a start size, 
and a start color, and gravity as well. I love this   properties happen once the particle is created. As 
soon as the particle is created, it starts with those

random values with one of those random values, and then we can control over the lifetime of the particle, some more properties like the color, for example, like the size, rotation, and so on. We can control a few of those properties over a lifetime, and the same thing happens in VFX graph. Right here, we have the initialized particle, which is whenever the particle is created and is not yet seen, not yet rendered. We are going to say things like, for example, it's going to have a lifetime, a velocity, a size, in this case, a scale because there is a little difference here on how we stretch particles compared to the particle system, and a set color, and a start color, basically. And just like in the particle system, these are the properties the particle starts with. However, to control one of those properties over a lifetime, it's a bit different. For example, the gravity in VFX graph is a force that needs to be continuously applied to the particle each frame as

well as the Collision it needs to keep on checking, if it has collided. But the overlife time blocks most of the times. We don't use them in the update particle. They are used down here in the fourth section, the output section, which is where we draw the particles. This is essentially the render. When comparing to the particle system, we take care of the aspect of the particle. So why do we use the overlifetime blocks down here? It's essentially a question of performance of memory usage. How do we write or read the particle data from the memory? The update particle section modifies start particle data and then loads it again, and it keeps on doing that. It keeps on reading the particle data and modifying it, and then loading again. It essentially keeps on updating the particle each frame. While on the output section, it doesn't store any modifications. It doesn't save the modifications. It simply modifies the existing data in the particle. That's the big advantage for

example in the update particle since it keeps on updating the particle. If we add, for example, add size over here with a very small number, it will keep on adding 0.1 each frame to the particle to the size of the particle. That's why it keeps on getting bigger. I mean, if I use a very very small value, you can see that in action. They become bigger throughout the end. While down here, if I use the nut size, it only adds 0.1 to the size one time. It doesn't read and load the particle data and keeps on updating the particle. That's the big difference down here. Another example of the update particle function is the possibility to keep on trigging events. In this case, when the particle dies, it triggers another particle system to spawn a child, to spawn a particle, and that child can inherit properties like position, color, and many others, but it also can have properties of its own, like in this case, the lifetime. These are essentially sub-emitters.

that we can see in the particle system. So, the meters in the particle system can emit another particle at Birth, death, on collision, and so on. Let's look at another few comparisons. For example, in the particle system, we are using a shape. So, the particles spawn according to the geometry used here, which is a cone shape. And there's plenty of other shapes in VFX graph. The same thing happens. We just need to search for position or shape, and we will find blocks for that. In our case, we are using not a cone but a sphere instead, but it is the same logic. A shape, a position, so the particle knows where to spawn. Another thing worth mentioning to enclose this video is, since VFX graph communicates directly with the GPU, we don't need to create a bunch of materials like we do in the particle system. We have direct access to the Shader instead, which is super useful because we can control values directly there. So, that's it. A super lightweight comparison between VFX graph.

and particle system. I hope this video makes 
you feel a little bit more confident to use VFX   graph, or at least go from the part consistent 
to VFX graph, a little bit more confident with   this side by side. Let me know below if you have 
any questions, any doubts in the comments. I will   try to help you out. And these videos are possible 
thanks to my patrons. A big thank you to each one   of them. And if you want to support me and keep 
the channel alive, you will also get access to a   huge library of visual effects that you can use 
in your games or study up close. And as usual, a   quick shout out to the top tier patrons, which are 
3D sorcery, Alex big, Alexander brazy, alfman, Avia   tobali, Axel, Bluebird, phone ad, groupie Dooby Doo, 
cyber cradle, Daniel Schmidt, yaku, Diana simonyan,   diagmark, deutron, effect yellow, El Sharif, easy 
thanks, Striker, Vari online, GD, and Dre Julio.

bevinuti Goblin ply crab lab guillerm Trinidad, gup and Zoo Jason Marrero Joseph Valentine Casey Miller Hebron campy Leanne old Lynn green Luke, Hammer Lucas Russia Manuel Moda May machakos, minuzuki Nicolas marioactive bullfrog Revenant games Robert arly Travis mccon very soon will, who's Will Pulliam and jinpion Lee. Thank you all for your amazing support over the years and over the last month. You guys keep the channel going and you helped me make these videos. I hope you have enjoyed this new type of videos and I hope to see you on the next video. Thanks, bye.

Unity VFX Graph VS Particle System - Comparing

Gabriel Aguiar Prod.

VFX 그래프에서 파티클 시스템으로 이펙트 변환하기

이 동영상은 VFX 그래프와 파티클 시스템의 유사점을 설명하여 보다 쉽게 지식을 전달하기 위한 것입니다.

가장 큰 차이점은 하나는 GPU를 사용하고 다른 하나는 CPU를 사용한다는 점이며, VFX 그래프는 블록 구조가 더 복잡하다는 점입니다.

이러한 차이점에도 불구하고 용어와 키워드는 두 시스템 간에 동일하게 유지되므로 원활하게 전환할 수 있습니다.

스파크 제작을 위한 파티클 시스템과 VFX 그래프 비교하기

왼쪽의 주황색 스파크는 파티클 시스템으로, 오른쪽 스파크는 VFX 그래프로 만들었으며, 두 가지 모두 비슷한 기법을 사용했습니다.

파티클 시스템과 VFX 그래프 모두 연속 스폰 방식을 사용하며, 파티클 시스템은 초당 50개의 파티클을 스폰하도록 설정하고 VFX 그래프는 초당 75개의 파티클을 스폰하도록 설정합니다.

또한 두 시스템 모두 파티클이 생성되면 수명, 속도, 크기, 색상, 중력 등 파티클의 프로퍼티를 제어합니다.

VFX 그래프에서 파티클 프로퍼티 제어하기

VFX 그래프에서 수명, 색상, 크기, 회전과 같은 파티클 프로퍼티는 파티클의 수명 동안 제어할 수 있으며, 성능과 메모리 효율성을 위해 출력 섹션에서 오버라이프타임 블록이 사용됩니다.

초기화된 파티클 섹션에서는 파티클이 시작하는 프로퍼티를 정의하고, 업데이트 파티클 섹션에서는 지속적으로 힘을 가하고 충돌을 확인합니다.

오버라이프타임 블록은 출력 섹션의 기존 데이터를 수정하도록 특별히 설계되어 수정 사항을 저장할 필요가 없어 성능이 향상되므로 업데이트 파티클 섹션에서는 사용되지 않습니다.

VFX 그래프에서 업데이트 파티클 함수의 힘

VFX 그래프의 파티클 업데이트 기능을 사용하면 파티클 프로퍼티를 지속적으로 변경하여 크기를 늘리고 이벤트를 트리거할 수 있습니다.

또한 원뿔이나 구체와 같은 다양한 모양을 파티클 스폰에 사용할 수 있습니다.

또한 VFX 그래프는 GPU에 직접 액세스할 수 있으므로 여러 개의 머티리얼이 필요하지 않으며 셰이더 값을 직접 제어할 수 있습니다.

VFX 튜토리얼에 대한 지원과 감사

화자는 동영상을 가능하게 해준 후원자에게 감사를 표하고 지원을 위해 시각 효과 라이브러리에 대한 액세스를 제공합니다.

채널 유지에 기여한 후원자의 이름을 거론하며 감사의 뜻을 전합니다.

화자는 시청자가 질문을 하도록 장려하고 VFX 사용에 대한 지원을 제공합니다.