Hi Developers!
I’m stuck at most easiest thing you possibile could imagine… Particle system…
So the main goal is to achieve something like weather system, you know rain/storm/snow…
But first thing first, I done material following simply tutorial and make my particle for rain… It’s based on GPU and emit my material in square constantly. Looks as i wanted in particle editor, so save and place on my map… My rain is showing nice in editor but my particle emiter pivot is in corner of square where rain appear… Maybe is not most important thing in world but how to center my pivot that it will appear in center of my square when rain occur?
But when I “click” play NO RAIN APPEARS! In fact it is raining only when camera is faced to the emiter itself, but when you turn it left or right or even 90 or 180 degree THERE IS NO RAIN…
I simply open “fresh” 3rd Person Example Map and add my particle and material to it… It’s same, when i see point where pivot is i see rain, looking around making rain stop.
Also in editor it’s shows about 3 times more rain drops then in game!!
Now I’m totally confused… I read somewhere that CPU particles works only when u see it but GPU based work all the time(with default settings)
Any help and advice how to make rain visible in all map area, are most welcome!
Also why number of the rain drops is ~3 times less in game then in editor??
My spec:
Windows 7 SP1 64bit Pro
Unreal Engine 4.16.3
Using Nvidia 760GTX Ti
I did recall of some particle setting about material facing camera always, Im not near computer atm, it might be also a texture coordinate adjusted in a way to obey camera position inside the material… hard to remember.
But, there is a rain material which works perfectly if you want to check that out and see what’s the difference. You can download it from Soul: City in Epic Content - UE Marketplace it is free to use for your own projects, was released by Epic few weeks ago.
If you mean to force material to be 2 side it is… I do not know how to “lock” material to be at front of camera all the time, but stil in editor mode rain drops are visible only when i look on emiter… (every drop got yellow frame in editor - when particle is selected) so if the problem will be textures cords I will still see this yellow borders of my drops on screen… but i do not… So for me is simple means that particle STOP TO EMIT when the pivot location is out of screen… It’s seams like engine render only when particle emiter is on screen - it is logic for most things but not working on large area effects… Is there any possibility to “play” particle even when emiter pivot is out of screen?
I think all emitters stop ticking when they are out of Field of View, meaning large ones will probably stop. What I have done in the past when researching rain particles, was to make the emitter follow the camera and rotate its orientation to be the same as the camera, the effect works, the particle don’t need to be large, just enough. The main problem occurs when you enter inside a covered area, which means an extra work to make the emitter stop following and stay outside.
The reason I have given to you that link is because that project Soul City has a rain and an environment totally functional, and as study is a good reference, probably even better than a tutorial, since it was made by Epic.
In Cascade, Click in the Black area outside of your emitter module list and then go to the details panel and Find the Fixed Bounds settings, and increase / decrease the bounds as necessary,
First of all thx for all answers!,
@NilsonLima
Yup, my first idea was to attach the rain/snow particles to the player but first i need to make it work and scale as I want…
Also I will check of course this rain from Epic…
@Luos Yes increase Fixed Bound Box help with size but still got 2 problems…
Particle works only when camera is looking on it… - is there other way then attaching it to camera?
In Editor I got a lot of rain but in game only few occurs - rain material is 2-sided - any solution? Increasing nr of spawn materials its only noticeable in editor but not in game…
Hey all, I’m having a similar issue with the rain fall soul city asset, its appearing the editor but not in game. Does anyone know how to solve this problem ?
Which is the scalability settings you are using? Which is the hardware you are using to run? If Im not mistaken, the engine might disable any sort of effect or material (yes, make even the material turn invisible) if the selected scalability (lets say Epic) is not compatible with the hardware in use. To be sure it is not the a scalability issue, you can change it and hit play, if the rain appears then this is the cause.