# Substrate - Feedback Thread

**URL:** <https://forums.unrealengine.com/t/substrate-feedback-thread/691314>\
**Category:** Rendering\
**Tags:** Staff-Pick-UE, Physically-Based-Shading, unreal-engine, Substrate, Rendering\
**Created:** [November 15, 2022, 5:18pm UTC](https://forums.unrealengine.com/t/substrate-feedback-thread/691314 "2022-11-15T17:18:55Z")\
**Posts on this page:** 1\
**Showing post:** 727

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**Author:** ![SebHillaire](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/sebhillaire/32/1194571_2.png) [@SebHillaire](https://forums.unrealengine.com/u/SebHillaire)\
**Post date:** [December 8, 2025, 7:43am UTC](https://forums.unrealengine.com/t/substrate-feedback-thread/691314/727 "2025-12-08T07:43:01Z")

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CPU lightmass baking was working at some point that is sure. I have not checked 5.7 but it is broken in 5.8 indeed you are correct. Adding it to the list. Thanks for reporting.

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