# Global Vector fields **URL:** \ **Category:** FX\ **Tags:** vector-fields, unreal-engine, question\ **Created:** [September 11, 2015, 6:24am UTC](https://forums.unrealengine.com/t/global-vector-fields/331815 "2015-09-11T06:24:21Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Cerambyx\_Cerdo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Cerambyx\_Cerdo](https://forums.unrealengine.com/u/Cerambyx_Cerdo)\ **Post date:** [September 11, 2015, 6:24am UTC](https://forums.unrealengine.com/t/global-vector-fields/331815/1 "2015-09-11T06:24:21Z")
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 ! ---
**Author:** ![Glitch\_Bliss](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Glitch\_Bliss](https://forums.unrealengine.com/u/Glitch_Bliss)\ **Post date:** [September 12, 2015, 10:35am UTC](https://forums.unrealengine.com/t/global-vector-fields/331815/2 "2015-09-12T10:35:15Z")
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](https://www.youtube.com/watch?v=G9vKSqRzhGQ)). 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 ! ---
**Author:** ![breno4551](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@breno4551](https://forums.unrealengine.com/u/breno4551)\ **Post date:** [October 7, 2015, 10:57am UTC](https://forums.unrealengine.com/t/global-vector-fields/331815/3 "2015-10-07T10:57:01Z")
These details should totally be added to the various wikis about working with Global Vector Fields