# Epic's GPUlightmass

**URL:** <https://forums.unrealengine.com/t/epics-gpulightmass/139357>\
**Category:** Rendering\
**Tags:** unreal-engine\
**Created:** [March 5, 2020, 12:52pm UTC](https://forums.unrealengine.com/t/epics-gpulightmass/139357 "2020-03-05T12:52:56Z")\
**Posts on this page:** 1\
**Showing post:** 554

<div class="post-metadata">

**Author:** ![motorsep](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/motorsep/32/918698_2.png) [@motorsep](https://forums.unrealengine.com/u/motorsep)\
**Post date:** [December 9, 2023, 2:42am UTC](https://forums.unrealengine.com/t/epics-gpulightmass/139357/554 "2023-12-09T02:42:29Z")

</div>

So, it’s a witchcraft… GPULM has its own mind I guess.

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/9/1/091ddd1a42cbaffff07d38c350c0b26118dfa3f7.jpeg)  
Changed nothing, except I ticked on SM6 for DX12 and Vulcan RHIs. Got all the shadows now building. Not complaining, but…

---

_[View the full topic](https://forums.unrealengine.com/t/epics-gpulightmass/139357)._