# How to make a particle systems Initial location affected by box size?

**URL:** <https://forums.unrealengine.com/t/how-to-make-a-particle-systems-initial-location-affected-by-box-size/279690>\
**Category:** FX\
**Tags:** particle-systems, unreal-engine, question\
**Created:** [April 5, 2014, 7:20pm UTC](https://forums.unrealengine.com/t/how-to-make-a-particle-systems-initial-location-affected-by-box-size/279690 "2014-04-05T19:20:37Z")\
**Posts on this page:** 1\
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**Author:** ![\_EPIC\_homeRye](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@\_EPIC\_homeRye](https://forums.unrealengine.com/u/_EPIC_homeRye)\
**Post date:** [April 7, 2014, 3:40pm UTC](https://forums.unrealengine.com/t/how-to-make-a-particle-systems-initial-location-affected-by-box-size/279690/5 "2014-04-07T15:40:37Z")

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You will want to use a particleParameter with your initial position, then create a vector variable, and modify that parameter via your variable in your Blueprint.

Here’s a link to ParticleParameter info.

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