# 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:** 205

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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:** [October 11, 2023, 3:31pm UTC](https://forums.unrealengine.com/t/substrate-feedback-thread/691314/205 "2023-10-11T15:31:14Z")

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Translucent materials do not appear in Lumen as of today (with Substrateor not). This is the current state. Please report lumen issues in the [Lumen thread](https://forums.unrealengine.com/t/lumen-gi-and-reflections-feedback-thread/501108).

If I understood correctly, those issues are from a project with Substrate OFF. Please remember that this is a thread for _ **Substrate only** _. See my comment from [Substrate - Feedback Thread - #194 by SebHillaire](https://forums.unrealengine.com/t/substrate-feedback-thread/691314/194)

If I missunderstood 🙂 and it is with Substrate, then remember that the path tracer is not up to date with Substrate.

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_[View the full topic](https://forums.unrealengine.com/t/substrate-feedback-thread/691314)._