# \#Substrate **URL:** https://forums.unrealengine.com/tag/substrate/11464.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Weird substrate glass reflection ](https://forums.unrealengine.com/t/weird-substrate-glass-reflection/2499555)
**Author:** [@GeppiKing](https://forums.unrealengine.com/u/GeppiKing)\ **Replies:** 1\ **Last updated:** [October 31, 2026, 11:28pm UTC](https://forums.unrealengine.com/t/weird-substrate-glass-reflection/2499555 "2026-10-31T23:28:28Z")
Hello, Im new to UE and im using Version 5.5.4. I have a project im working on and i dont understand whats going on with my glass material or what im doing wrong. I have spend 2 days trying to fix it with chatGPT and yo… --- ## [Substrate - Feedback Thread](https://forums.unrealengine.com/t/substrate-feedback-thread/691314)
**Author:** [@SebHillaire](https://forums.unrealengine.com/u/SebHillaire)\ **Replies:** 820\ **Last updated:** [September 22, 2026, 6:21pm UTC](https://forums.unrealengine.com/t/substrate-feedback-thread/691314 "2026-09-22T18:21:29Z")
Hello everyone, My name is Sébastien Hillaire and I am the co-author of Substrate along with Charles de Rousiers. Substrate Materials have been released as experimental in Unreal 5.1. As described in the documentation:… --- ## [ Substrate Anisotropy lost when enabling translucency ](https://forums.unrealengine.com/t/substrate-anisotropy-lost-when-enabling-translucency/2768700)
**Author:** [@Rx1000s](https://forums.unrealengine.com/u/Rx1000s)\ **Replies:** 0\ **Last updated:** [September 14, 2026, 3:30pm UTC](https://forums.unrealengine.com/t/substrate-anisotropy-lost-when-enabling-translucency/2768700 "2026-09-14T15:30:34Z")
Summary While testing the Substrate system in Unreal Engine 5.6, enabling Translucency still preserved the Anisotropic shading features correctly. However, in Unreal Engine 5.7 and 5.8, enabling translucency causes Anis… --- ## [\[Substrate\] Blendable GBuffer silently discards F0 chromaticity for dark metals — same F0, different results between legacy-converted and hand-built Slab materials ](https://forums.unrealengine.com/t/substrate-blendable-gbuffer-silently-discards-f0-chromaticity-for-dark-metals-same-f0-different-results-between-legacy-converted-and-hand-built-slab-materials/2741166)
**Author:** [@RDFZTIZ](https://forums.unrealengine.com/u/RDFZTIZ)\ **Replies:** 0\ **Last updated:** [August 4, 2026, 2:50pm UTC](https://forums.unrealengine.com/t/substrate-blendable-gbuffer-silently-discards-f0-chromaticity-for-dark-metals-same-f0-different-results-between-legacy-converted-and-hand-built-slab-materials/2741166 "2026-08-04T14:50:45Z")
TL;DR: With Substrate enabled and Substrate GBuffer Format = Blendable GBuffer, a hand-built Slab BSDF loses specular color (hue) when F0 is dark (below the typical conductor range). The same input values through the leg… --- ## [PixelNormalWS node not working with Substrate](https://forums.unrealengine.com/t/pixelnormalws-node-not-working-with-substrate/2738303)
**Author:** [@HeartOfKay](https://forums.unrealengine.com/u/HeartOfKay)\ **Replies:** 0\ **Last updated:** [July 25, 2026, 2:12pm UTC](https://forums.unrealengine.com/t/pixelnormalws-node-not-working-with-substrate/2738303 "2026-07-25T14:12:26Z")
Summary The PixelNormalWS node in the material graph outputs the same as the VertexNormalWS node when connected to a Substrate slab without taking into account the normal maps connected to the same slab. (Tested with Sub… --- ## [\[5.8\] \[substrate\] OpenPbr Material Function is wrong ](https://forums.unrealengine.com/t/5-8-substrate-openpbr-material-function-is-wrong/2734675)
**Author:** [@nebukadhezer](https://forums.unrealengine.com/u/nebukadhezer)\ **Replies:** 0\ **Last updated:** [July 9, 2026, 1:55pm UTC](https://forums.unrealengine.com/t/5-8-substrate-openpbr-material-function-is-wrong/2734675 "2026-07-09T13:55:09Z")
Summary \[Bug\] OpenPBR opaque material function uses base\_diffuse\_roughness on dielectrics as the roughness on the substrate material. It should use the specular roughness instead, as substrate does not have a diffuse rou… --- ## [SceneTextureLookup hlsl function no longer works in substrate](https://forums.unrealengine.com/t/scenetexturelookup-hlsl-function-no-longer-works-in-substrate/1302873)
**Author:** [@Liquos](https://forums.unrealengine.com/u/Liquos)\ **Replies:** 3\ **Last updated:** [June 28, 2026, 4:55am UTC](https://forums.unrealengine.com/t/scenetexturelookup-hlsl-function-no-longer-works-in-substrate/1302873 "2026-06-28T04:55:33Z")
Hello, I would like to make some custom post process materials using the Custom HLSL node, and I need to do multiple texture lookups. Previously, I would use the SceneTextureLookup function in hlsl to do this, but it no… --- ## [UE 5.6 - Substrate Transparency not working. Colors not updating in Material Editor](https://forums.unrealengine.com/t/ue-5-6-substrate-transparency-not-working-colors-not-updating-in-material-editor/2543650)
**Author:** [@originalemanuel](https://forums.unrealengine.com/u/originalemanuel)\ **Replies:** 11\ **Last updated:** [May 20, 2026, 6:13pm UTC](https://forums.unrealengine.com/t/ue-5-6-substrate-transparency-not-working-colors-not-updating-in-material-editor/2543650 "2026-05-20T18:13:46Z")
I just uninstalled and installed UE 5.6 from scratch to make sure there were no leftovers from the preview Version. So I enabled Substrate in the Project and followed all kinds of Tutorials & the Documentation abou… --- ## [UE 5.7 Landscape Blending Issue with Substrate Materials](https://forums.unrealengine.com/t/ue-5-7-landscape-blending-issue-with-substrate-materials/2722279)
**Author:** [@looore91](https://forums.unrealengine.com/u/looore91)\ **Replies:** 0\ **Last updated:** [May 15, 2026, 7:46am UTC](https://forums.unrealengine.com/t/ue-5-7-landscape-blending-issue-with-substrate-materials/2722279 "2026-05-15T07:46:37Z")
Hi everyone, I’m trying to follow several YouTube tutorials about blending objects with the landscape using Runtime Virtual Textures in Unreal Engine 5.7, but I’m running into an issue. In all the tutorials, they use s… --- ## [Foliage nanite and pathtracing](https://forums.unrealengine.com/t/foliage-nanite-and-pathtracing/2603151)
**Author:** [@andreaiga](https://forums.unrealengine.com/u/andreaiga)\ **Replies:** 1\ **Last updated:** [May 13, 2026, 11:27pm UTC](https://forums.unrealengine.com/t/foliage-nanite-and-pathtracing/2603151 "2026-05-13T23:27:33Z")
Hi guys, I’m currently working on a cinematic for an automotive project, we are using the path trace re for rendering. I would like to know more about how to set up foliage assets and what actually works and what not. F… --- ## [Substrate gives me these weird dots when using color map on automotive materials ](https://forums.unrealengine.com/t/substrate-gives-me-these-weird-dots-when-using-color-map-on-automotive-materials/2713410)
**Author:** [@Los\_Uberos](https://forums.unrealengine.com/u/Los_Uberos)\ **Replies:** 1\ **Last updated:** [May 6, 2026, 4:38pm UTC](https://forums.unrealengine.com/t/substrate-gives-me-these-weird-dots-when-using-color-map-on-automotive-materials/2713410 "2026-05-06T16:38:19Z")
Hi everyone, I’m currently working on a project and wanted to use substance. I’m using the automotive materials pack and tried to input a texture I created in Substance Painter into a couple of the materials to see h… --- ## [Substrate Automotive - Coated materials produce NaN/bad pixel](https://forums.unrealengine.com/t/substrate-automotive-coated-materials-produce-nan-bad-pixel/2713429)
**Author:** [@The\_Distiller](https://forums.unrealengine.com/u/The_Distiller)\ **Replies:** 3\ **Last updated:** [April 20, 2026, 8:41am UTC](https://forums.unrealengine.com/t/substrate-automotive-coated-materials-produce-nan-bad-pixel/2713429 "2026-04-20T08:41:59Z")
The substrate automotive materials produce a NaN/bad pixel in the top left corner, when using any multi coated material. This is happening on multiple Windows machines with different configurations (3090 to 5090). --- ## [Help Needed - Substrate Glass Appearing differently between Preview and Scene](https://forums.unrealengine.com/t/help-needed-substrate-glass-appearing-differently-between-preview-and-scene/2702718)
**Author:** [@ELEV-Trav](https://forums.unrealengine.com/u/ELEV-Trav)\ **Replies:** 2\ **Last updated:** [March 25, 2026, 11:54am UTC](https://forums.unrealengine.com/t/help-needed-substrate-glass-appearing-differently-between-preview-and-scene/2702718 "2026-03-25T11:54:36Z")
Hi all, Running into a weird thing with UE 5.7. I’m trying to make better materials, and the glass specifically is giving me a bit of trouble with substrate. I switched to Substrate because having a polished glass tha… --- ## [Who will be enabling substrate on their existing projects?](https://forums.unrealengine.com/t/who-will-be-enabling-substrate-on-their-existing-projects/2690547)
**Author:** [@Subressor](https://forums.unrealengine.com/u/Subressor)\ **Replies:** 1\ **Last updated:** [January 8, 2026, 11:07am UTC](https://forums.unrealengine.com/t/who-will-be-enabling-substrate-on-their-existing-projects/2690547 "2026-01-08T11:07:41Z")
Keeping up with the progress on substrate; looks cool, great job to the team, some nice use cases for non-realtime projects. However overall it feels like a very niche solution considering the wider use of the engine. T… --- ## [Does path tracer support subsurface profile in substrate materials?](https://forums.unrealengine.com/t/does-path-tracer-support-subsurface-profile-in-substrate-materials/2689447)
**Author:** [@kk13](https://forums.unrealengine.com/u/kk13)\ **Replies:** 1\ **Last updated:** [January 5, 2026, 7:07pm UTC](https://forums.unrealengine.com/t/does-path-tracer-support-subsurface-profile-in-substrate-materials/2689447 "2026-01-05T19:07:07Z")
When I render materials using subsurface profile with normal lighting, everything works fine. However, when I switch to path tracer, the subsurface profile has no effect at all. Is this because path tracer currently does… --- ## [Can someone tell me about Substrates performance?](https://forums.unrealengine.com/t/can-someone-tell-me-about-substrates-performance/2681764)
**Author:** [@kurylo3d](https://forums.unrealengine.com/u/kurylo3d)\ **Replies:** 3\ **Last updated:** [December 3, 2025, 8:37pm UTC](https://forums.unrealengine.com/t/can-someone-tell-me-about-substrates-performance/2681764 "2025-12-03T20:37:59Z")
Can someone tell me about Substrates performance?. I tested it and upgraded one of my materials that was already heavy with 800 instructions… and turned it into over 2500 instructions. I did not expect such a high inst… --- ## [Quantum Dejavu - Epic Mega Jam 2025](https://forums.unrealengine.com/t/quantum-dejavu-epic-mega-jam-2025/2668214)
**Author:** [@FaxLab3D](https://forums.unrealengine.com/u/FaxLab3D)\ **Replies:** 0\ **Last updated:** [October 24, 2025, 8:26am UTC](https://forums.unrealengine.com/t/quantum-dejavu-epic-mega-jam-2025/2668214 "2025-10-24T08:26:02Z")
Hey all, I wanted to share my submission tho Epic Mega Jam. Theme was “Here we go again” So in Quantum Dejavu you have to solve the puzzle in given time or else you go again. Its an atmospheric, liminal v… --- ## [Substrate + .fbx Export?](https://forums.unrealengine.com/t/substrate-fbx-export/2624209)
**Author:** [@BernhardRieder](https://forums.unrealengine.com/u/BernhardRieder)\ **Replies:** 0\ **Last updated:** [July 30, 2025, 7:14pm UTC](https://forums.unrealengine.com/t/substrate-fbx-export/2624209 "2025-07-30T19:14:06Z")
I am trying to export .fbx files when substrate is active. For some odd reason, it seems texture map information is not carried over. Am I missing something here? Or does Substrate not support .fbx export with texture… --- ## [Substrate + .glb PBR-Material Support?](https://forums.unrealengine.com/t/substrate-glb-pbr-material-support/2621577)
**Author:** [@BernhardRieder](https://forums.unrealengine.com/u/BernhardRieder)\ **Replies:** 0\ **Last updated:** [July 28, 2025, 7:25pm UTC](https://forums.unrealengine.com/t/substrate-glb-pbr-material-support/2621577 "2025-07-28T19:25:16Z")
Substrate + .glb export supporting PBR-Materials: It looks like, once you switched to Substrate Materials, you can’t carry basic PBR-Material Information over to .glb file format. Running some tests. I was not able to … --- ## [Converting legacy character to Substrate](https://forums.unrealengine.com/t/converting-legacy-character-to-substrate/2612231)
**Author:** [@M3Ratchata](https://forums.unrealengine.com/u/M3Ratchata)\ **Replies:** 0\ **Last updated:** [July 20, 2025, 9:04pm UTC](https://forums.unrealengine.com/t/converting-legacy-character-to-substrate/2612231 "2025-07-20T21:04:03Z")
Hey everyone, I recently had a chance to test out the new Substrate material system by tossing one of my older projects into it - just to see if we could squeeze out any extra juice without too much effort. \*\*Turns out… --- ## [Substrate and new Material Designer](https://forums.unrealengine.com/t/substrate-and-new-material-designer/2595158)
**Author:** [@Pylik](https://forums.unrealengine.com/u/Pylik)\ **Replies:** 0\ **Last updated:** [July 7, 2025, 12:36pm UTC](https://forums.unrealengine.com/t/substrate-and-new-material-designer/2595158 "2025-07-07T12:36:18Z")
Hey guys, сan someone explain to me what’s wrong with Substrate and Material Designer? I started a project with Motion Designer plugin, then when I activated Substrate, the Material Designer doesn’t show channels they a… --- ## [Translucent Materials behind Other Translucent Materials Ignore Refraction](https://forums.unrealengine.com/t/translucent-materials-behind-other-translucent-materials-ignore-refraction/1782432)
**Author:** [@Shrooblord](https://forums.unrealengine.com/u/Shrooblord)\ **Replies:** 22\ **Last updated:** [June 6, 2025, 5:51pm UTC](https://forums.unrealengine.com/t/translucent-materials-behind-other-translucent-materials-ignore-refraction/1782432 "2025-06-06T17:51:43Z")
Hey there, I’ve got the problem as detailed in this video: In words, the problem is the following: refraction works through translucent materials, until another material that also has translucency and/or… --- ## [I have a problem with disabling the Substrate Materials](https://forums.unrealengine.com/t/i-have-a-problem-with-disabling-the-substrate-materials/2479567)
**Author:** [@fokius1](https://forums.unrealengine.com/u/fokius1)\ **Replies:** 1\ **Last updated:** [April 28, 2025, 12:33pm UTC](https://forums.unrealengine.com/t/i-have-a-problem-with-disabling-the-substrate-materials/2479567 "2025-04-28T12:33:12Z")
UE 5.4, enabled Substrate → saved ~2k materials. Need to ship on DX11 / decals / water. If I disable Substrate, materials go black. Any tool/email script to batch-revert to legacy or selective toggle? --- ## [Substrate Opaque Material Rough Refraction Breaks With All Non-Directional Lights](https://forums.unrealengine.com/t/substrate-opaque-material-rough-refraction-breaks-with-all-non-directional-lights/2452011)
**Author:** [@Pirexx303](https://forums.unrealengine.com/u/Pirexx303)\ **Replies:** 1\ **Last updated:** [April 12, 2025, 6:29pm UTC](https://forums.unrealengine.com/t/substrate-opaque-material-rough-refraction-breaks-with-all-non-directional-lights/2452011 "2025-04-12T18:29:37Z")
What the title says. I have Opaque Material Rough Refraction enabled in the project, and it works… until I bring a light into the scene. The shader effect works perfectly when a directional light is present, but the mo… --- ## [Path Tracing with Substrate enabled crash on 9070XT (DXGI\_ERROR\_DEVICE\_HUNG)](https://forums.unrealengine.com/t/path-tracing-with-substrate-enabled-crash-on-9070xt-dxgi-error-device-hung/2384917)
**Author:** [@kotn3l](https://forums.unrealengine.com/u/kotn3l)\ **Replies:** 4\ **Last updated:** [April 10, 2025, 12:42pm UTC](https://forums.unrealengine.com/t/path-tracing-with-substrate-enabled-crash-on-9070xt-dxgi-error-device-hung/2384917 "2025-04-10T12:42:42Z")
Hey all, I recently switched to 9070XT GPU. I cleared all UE shader caches, 13K shaders have been recompiled upon opening my project. Whenever I turn on path-tracing, UE5.5 crashes. Lit mode works well. My GPU settings … --- ## [Substrate limitations](https://forums.unrealengine.com/t/substrate-limitations/2331369)
**Author:** [@JuanMaldini](https://forums.unrealengine.com/u/JuanMaldini)\ **Replies:** 0\ **Last updated:** [February 13, 2025, 5:36pm UTC](https://forums.unrealengine.com/t/substrate-limitations/2331369 "2025-02-13T17:36:05Z")
Hello community, i have some questions about substrate and some errors that i’m having. I’m using substrate and tryng to create an master material that can have 5 materials inside. For every material, it will has clear… --- ## [Is there a way to filter substrate materials in the project ?](https://forums.unrealengine.com/t/is-there-a-way-to-filter-substrate-materials-in-the-project/2271831)
**Author:** [@Armines53](https://forums.unrealengine.com/u/Armines53)\ **Replies:** 0\ **Last updated:** [January 11, 2025, 7:40pm UTC](https://forums.unrealengine.com/t/is-there-a-way-to-filter-substrate-materials-in-the-project/2271831 "2025-01-11T19:40:24Z")
Hi, is there a way to separate substrate materials and legacy materials ? --- ## [\[Feature Request\] Missing important Scene Texture in Material Editor.](https://forums.unrealengine.com/t/feature-request-missing-important-scene-texture-in-material-editor/2244650)
**Author:** [@Ibtesam\_Sadiq](https://forums.unrealengine.com/u/Ibtesam_Sadiq)\ **Replies:** 0\ **Last updated:** [December 27, 2024, 12:05am UTC](https://forums.unrealengine.com/t/feature-request-missing-important-scene-texture-in-material-editor/2244650 "2024-12-27T00:05:26Z")
In Material Editor, there is a scene texture expression node, that has lot of scene texture ID that we can use to access different data. It would be great if we could have few more scene texture IDs: Emissive color (H… --- ## [UE recompiles shaders on every frame of rendering](https://forums.unrealengine.com/t/ue-recompiles-shaders-on-every-frame-of-rendering/2156255)
**Author:** [@Kidt](https://forums.unrealengine.com/u/Kidt)\ **Replies:** 2\ **Last updated:** [December 12, 2024, 8:23pm UTC](https://forums.unrealengine.com/t/ue-recompiles-shaders-on-every-frame-of-rendering/2156255 "2024-12-12T20:23:49Z")
LogShaderCompilers: Warning: Failed to compile Material /Engine/Transient.Footage CaptureData Material for platform PCD3D\_SM6, Default Material will be used in game. /Engine/Private/SlateElementPixelShader.usf:16… --- ## [Should Unlit Transparent Substrate Materials use Coverage Weight?](https://forums.unrealengine.com/t/should-unlit-transparent-substrate-materials-use-coverage-weight/2121550)
**Author:** [@Twads9816](https://forums.unrealengine.com/u/Twads9816)\ **Replies:** 0\ **Last updated:** [November 14, 2024, 2:46am UTC](https://forums.unrealengine.com/t/should-unlit-transparent-substrate-materials-use-coverage-weight/2121550 "2024-11-14T02:46:47Z")
The Substrate documentation says that only the Slab and Clear Coat BSDFs can use the Substrate Operator nodes. However the Unlit BSDF seems to work correctly with the Coverage Weight Operator. Is this how Unlit Transpare… [Next page](https://forums.unrealengine.com/tag/substrate/11464.md?match_all_tags=true&page=1&tags%5B%5D=Substrate)