# How to generate smoke effect on a ever-changing mesh?

**URL:** <https://forums.unrealengine.com/t/how-to-generate-smoke-effect-on-a-ever-changing-mesh/470774>\
**Category:** Community & Industry Discussion\
**Tags:** realtime, unreal-engine, question\
**Created:** [September 3, 2020, 5:09pm UTC](https://forums.unrealengine.com/t/how-to-generate-smoke-effect-on-a-ever-changing-mesh/470774 "2020-09-03T17:09:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Player\_ton](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Player\_ton](https://forums.unrealengine.com/u/Player_ton)\
**Post date:** [September 3, 2020, 5:09pm UTC](https://forums.unrealengine.com/t/how-to-generate-smoke-effect-on-a-ever-changing-mesh/470774/1 "2020-09-03T17:09:12Z")

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Hi there !

Here comes a tricky quesion :

I am using UE4 4.18 with Flex and Flow function for a project.

I would like to attach Flow(or smoke effect) on Flex-generated fluid.  
The Flex-generated fluid will keep changing into any random shape, any random size and with rotation,  
it changes in real-time.like this second it is as big as a baseball but it becomes serval long metal-melting shape.

This is the effect that I want to do, but the mesh(or fluid) should keep changing shapes, and the smoke effect generate depends on its shape:

> **[vid03.avi](https://drive.google.com/file/d/1PmcmwSsAZmqkOHdZ1Y73lC96tINx1O0H/view)**
>
> Google Drive file.

I know the PhyX from Nivida is coming out, but we don’t know its exact date  
and the deadline of this project is coming !!!  
I have spent countless hours to figuer it out… Please give me some suggestion !

Thank you very much !!