(LWRP) Using 2D Lights in a Particle System Emitter

Is that possible? The Particle System won't allow me to use a 2D light in its emitter. Am I missing something or is this not implemented yet?

 

Hey all,

I'm in the same situation as the early publisher, I find LWRP super for my case (2D game, high level view on a map), but I'm currently using particle system to simulate fireflies, with the super nice noise, emission and lights... making LWRP for now not an option :/

Is there any forecast on next Unity releases proposing this feature ?

 

Hey, Is it possible to make a partial system through shaders and thereby use 2D light?

 

I'm using particles systems (due to their flexibility) for projectiles, explosions, item pickups and of course vfx. Yes, 2D lights would be fantastic!

 

Hello is there any alternative to implement this ? Currently stuck at here

 

I also would be really interessted in having 2D light particles !

 

Please add 2D lights to particles

 

I am also very interested. Please, it would be great if you could implement it.

 

Well, VFX Graph with Sprite Lit Output would be cool.

 

+1 - I'm also using Particle Systems for various effects in an otherwise strictly 2D game, and I'd love to be able to use 2D lights on particles in 2D URP. In fact, I came to this thread when searching how to do it.

 

I could really use 2D lights with particles to create glowing sparks in my 2D game.

 

It is works, but only in the beginning, then I have this his error:

Code (CSharp):

1. MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it.
2. Your script should either check if it is null or you should not destroy the object.
3. AttachGameObjectsToParticles.LateUpdate () (at Assets/Game/Scripts/Misc/AttachGameObjectsToParticles.cs:36)

 

I got that, I just have "Destroy after" script on my prefab. Everything fine now

 

Would love it is 2D Lights were supported for particles as well, thanks.

 

Hey! I'm so sad about this... I was trying to figure out why my particle system doesn't accept my 2D light... Now I know...
Please do us this huge favor and implement this, guys...

 

Hiya!
The script helps a lot, thank you!
I have attached 2D lights to it but now I am working on fading the light in and out to be a bit more realistic. At the moment it looks like the light just all of a sudden shows up and lights up the area around it. I have managed to get a script working to do the fade in and out by attaching a script to a 2D Light prefab and running a coroutine on those lights. The problem I am facing is that now some of the particles, all of a sudden jump their position somewhere else within the are of the Particle System and it looks again as if more intense light source was showing up in the scene. Any ideas how to tackle that?

 

Hello! Sorry, I'm new to unity development, please tell me where to put this script and what to add to the Prefab field (as I understand it - this is an object that will be my particle)?)

 

Maybe we can give the sprite's material an emission map with 2D shader graphs, then attach a 2d light to the particle system GameObject, it might look as if the particles are emitting light. Maybe even change the light's color based on particles color in real-time. Didn't try it yet though.

 

actually other than particles emission slot is necessary for some other distinctions in lit shader.

 

Worked perfectly for me thanks!

 

Hi, just cooked up another method. Create another sorting layer for your particle effect then have a 2D global light which only affects the layer with the particle effect on works very well.

 

But does that illuminate sprites below the particles? I think it wouldn't, right?

 

I've worked on changing the size of the light to match particle size.

Just add this line inside the "for" in first place.
Maybe you have to play a little bit with the radius or size of the light in the prefab, but it will work.

Code (CSharp):

1. m_Instances[i].transform.localScale = new Vector3(m_Particles[i].startSize, m_Particles[i].startSize, m_Particles[i].startSize)

Nothing complex, just changing scale to particle size.
I've tried doing this only once x particle/light but couldn't find any way.

 

Muchas gracias, me sirvio, quedo genial

 

No, it wouldn't.

 

this was a wonderful addition onit's own... it DOES seem to react more like i would like ONLY when the particles are set to "World" instead of local (scale and distance were issues before i checked this... so i traded some performance for not having to manually change the scale and distance for each instance i had)


Thanks So Much!

 

Wonderful script ! So it was that easy to implement. It was very easy to tweak it so that it reflects the original module as well. Thanks !

 

+1 would really appreciate having 2d lights work with particle systems. Would feel so intuative and have so many creative applications. I'll use your script for now, but I always feel sort of uncomfortable with bespoke solutions - I like it when it feels like you're working with the engine in the way that it's designed. Peace and love.

 

+1 I'm creating a particle system in a 2D game that is supposed to simulate sparks coming from a damaged panel in a dark room. The effect would be amazing if each particle could render lighting to the right layers!

 

+1 2D light for particle system pls

 

Just adding another +1 here for being able to use 2D lights in a particle system. If Unity is serious about Project Tiny and being a first-class authoring environment for 2D games, this seems like a pretty important feature request

 

Thanks! It works perfectly for my muzzle flash.

 

+1 for support of 2D lights in the Lights module of the Particle System!!!
Pls !!!

 

I also encountered this problem. But what I did is the following:
*make a round sprite that gradients outward with transparent background(this is what I need on my project but you can make whatever)
*create a new lit material using this sprite
*let your particle system use this material
*move the particle system to its own sorting layer
*create a new 2D global light for this layer and make sure no other global lights affect this layer

This way, you can manipulate the particles' color, alpha, etc. and it should work as intended(atleast for me). I'm new to unity and this is just a simple(and incomplete) work around I came up with after a week of agony.

 

I've been playing around with this particle light script myself, and realized its possible to tweak intensity based on a particle's remaining lifetime, it sort of works in regards that a particle's illumination now fades as the lifetime ends, but when a new particle is instantiated the light suddenly appears at full intensity making it a bit jumpy.

Just add this line in after the if/else worldspace check:

Code (CSharp):

1. m_Instances[i].GetComponent<UnityEngine.Experimental.Rendering.Universal.Light2D>().intensity = (m_Particles[i].remainingLifetime / intensityDivider);

intensityDivider in this case is merely a value I use to dampen excess intensity to avoid having extremely bright particles, can be replaced for any float value desired.

And should give you this ok-ish fading light effect that works for firefly types of particles:

 

I dont know if this is still an issue for some of you or if you want another way to add light to your PS. I figured out that you can do it by using HDR as the color for the material. Then you can tweak the intensity of the color and apply bloom to your scene by adding a global volume.

 

Still needed lol

 

The script isn't working for me somehow, it isn't instantiating any GameObjects at all. Anyone else have a similar problem and got it to work?

 

Thanks!

Is this still the preferred way to do it in 2023?