# How do I use post processing variables?

**URL:** <https://forums.unrealengine.com/t/how-do-i-use-post-processing-variables/288328>\
**Category:** Programming & Scripting\
**Tags:** unreal-engine\
**Created:** [July 16, 2014, 5:23am UTC](https://forums.unrealengine.com/t/how-do-i-use-post-processing-variables/288328 "2014-07-16T05:23:51Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![robbiecooper](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@robbiecooper](https://forums.unrealengine.com/u/robbiecooper)\
**Post date:** [July 16, 2014, 5:34am UTC](https://forums.unrealengine.com/t/how-do-i-use-post-processing-variables/288328/2 "2014-07-16T05:34:20Z")

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Hi AttemptD

This is a really good tutorial for learning the basics of using post process settings;

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Obviously you wouldn’t need a line trace, but you’d probably need it to be on tick for the duration of the effect. You’d need to make and break post process settings on the camera you’re looking through.

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