# Volumetric Lights in the shadow background

**URL:** <https://discourse.threejs.org/t/volumetric-lights-in-the-shadow-background/91075>\
**Category:** Questions\
**Tags:** materials, shaders, geometry\
**Created:** [April 18, 2026, 5:06am UTC](https://discourse.threejs.org/t/volumetric-lights-in-the-shadow-background/91075 "2026-04-18T05:06:11Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Myth\_Xenodo](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/myth_xenodo/32/27434_2.png) [@Myth\_Xenodo](https://discourse.threejs.org/u/Myth_Xenodo)\
**Post date:** [April 18, 2026, 5:06am UTC](https://discourse.threejs.org/t/volumetric-lights-in-the-shadow-background/91075/1 "2026-04-18T05:06:11Z")

</div>

Hi, currently I am trying to achieve this shadows background that happening within the mesh in volumetric light scatter example that three.js have but I couldn’t achieve it… so what am I doing wrong here would like to get help thank you!

 ![image](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/3X/f/c/fcbf156e6381fa2f861cd0e53c618872cf2fbb74.jpeg)

> **[three.js examples](https://threejs.org/examples/?q=light#webgpu_volume_lighting_traa)**

Currently it is visible to mine in a top view but below view or side view I couldn’t get it right.. I don’t feel the shadow presence behind its back.

 ![image](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/3X/0/0/00cca6f63a782f31a57da19ac8a01b110026a5e8.jpeg)

 ![image](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/3X/7/5/7563f3108162f98618e1575434b12302bf94edd6.jpeg)

[https://codesandbox.io/p/sandbox/ckzrlz](https://codesandbox.io/p/sandbox/ckzrlz)