# Weird EffectComposer result

**URL:** <https://discourse.threejs.org/t/weird-effectcomposer-result/70485>\
**Category:** Questions\
**Tags:** effect-composer\
**Created:** [September 9, 2024, 2:00pm UTC](https://discourse.threejs.org/t/weird-effectcomposer-result/70485 "2024-09-09T14:00:57Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![electric.cicada](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/electric.cicada/32/34971_2.png) [@electric.cicada](https://discourse.threejs.org/u/electric.cicada)\
**Post date:** [September 10, 2024, 8:43pm UTC](https://discourse.threejs.org/t/weird-effectcomposer-result/70485/5 "2024-09-10T20:43:55Z")

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Hi @Mugen87, took me a bit, but finally I managed to reproduce it in a [fiddle](https://jsfiddle.net/ren_senage/8qc1j9e3/16/).

I put a 2s timeout to switch from the default renderer to the composer.  
By default (with the OutputPass added), you can see the scene turning “brighter”.  
If you comment it out (line `594`) and rerun it, it will turn darker.  
But it will never reproduce the original result.

Forgive the bloated setup in the beginning, I needed to build something similar to what I have.  
And really appreciate you looking into it, thank you!

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_[View the full topic](https://discourse.threejs.org/t/weird-effectcomposer-result/70485)._