Global Vector fields

Development Asset Creation FX
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1

Hello !

I am tring to use Global Vector fields like explained in the official documentation, but without any success.
I have a GPU particle emitter with the global vf module activated, a field in a vector actor volume on my scene, but both seems to completely ignore each other.

I tried to use the same vector field in a local vector field of my emitter and it works just fine !
I have tried to use the same vector field in global mode with other emitter too, but without any reaction.

Could you help me understand what I did wrong ?

Thank you !

2

I answer my own question, it could be useful to a future user :

  • First, I tried to reproduce a basic snow emitter (found in this tutorial : PTV Unreal Engine 4 Particle Systems Tutorial 1 (Let It Snow!) - YouTube). The original emitter works with Global Vector field, but not my copy. Finally, it was besauce I didn’t enabled “set fixed bounds” in the top menu (even if I checked “Use Fixed Relative Bounding Box” in Particle system details). After fixed bounds enabled, GBF was recognized.

  • Then, when I tried to apply this discovery to my working emitter, I got stuck again. The particles didn’t reacted to GBF even with bound fixed. It was besause I had “Use Local Space” checked in Required module details of the particle.

Finally, it works like a charm !

3

These details should totally be added to the various wikis about working with Global Vector Fields