# Debugging, Optimization, & Profiling **URL:** https://forums.unrealengine.com/c/development-discussion/platforms/debugging-optimization-profiling/134.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [About the Debugging, Optimization, & Profiling category](https://forums.unrealengine.com/t/about-the-debugging-optimization-profiling-category/248668)
**Author:** [@SkyeEden](https://forums.unrealengine.com/u/SkyeEden)\ **Replies:** 0\ **Last updated:** [September 2, 2021, 3:43pm UTC](https://forums.unrealengine.com/t/about-the-debugging-optimization-profiling-category/248668 "2021-09-02T15:43:23Z")
Looking for discussions on debugging, optimizing and profiling your projects? This is the place for you. --- ## [How to stop grass from spawning on slopes](https://forums.unrealengine.com/t/how-to-stop-grass-from-spawning-on-slopes/264190)
**Author:** [@Hupu01](https://forums.unrealengine.com/u/Hupu01)\ **Replies:** 5\ **Last updated:** [November 10, 2026, 10:45pm UTC](https://forums.unrealengine.com/t/how-to-stop-grass-from-spawning-on-slopes/264190 "2026-11-10T22:45:37Z")
I am using a slope function to have rock texture spawn on certain slopes and the rest remains grass. When I try to use the grass output node and tell it to only sample grass it still is spawning it over my entire landsca… --- ## [How multi targeting tracking would work](https://forums.unrealengine.com/t/how-multi-targeting-tracking-would-work/2852796)
**Author:** [@L00nyspirit](https://forums.unrealengine.com/u/L00nyspirit)\ **Replies:** 0\ **Last updated:** [November 9, 2026, 11:17am UTC](https://forums.unrealengine.com/t/how-multi-targeting-tracking-would-work/2852796 "2026-11-09T11:17:51Z")
so i want to make an axe that when thrown will move to a target and once hit/killed will move to the next closest target and repeat but im not sure how i could make work. i know i can use homing for a single target but … --- ## [Running two copies of Unreal engine compiling shaders issue](https://forums.unrealengine.com/t/running-two-copies-of-unreal-engine-compiling-shaders-issue/2848783)
**Author:** [@AdamPD](https://forums.unrealengine.com/u/AdamPD)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 9:35am UTC](https://forums.unrealengine.com/t/running-two-copies-of-unreal-engine-compiling-shaders-issue/2848783 "2026-11-02T09:35:13Z")
Hey all, Just a quick question if I may. I run two copies of Unreal Engine (5.7) on the same machine, as I run a modkit for the game Bellwright and there’s two versions of it, a prerelease “staging” kit and the public … --- ## [Trying to optimize hardware Lumen Reflections with Nsight Graphics](https://forums.unrealengine.com/t/trying-to-optimize-hardware-lumen-reflections-with-nsight-graphics/2848776)
**Author:** [@Yuri9447](https://forums.unrealengine.com/u/Yuri9447)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 8:26am UTC](https://forums.unrealengine.com/t/trying-to-optimize-hardware-lumen-reflections-with-nsight-graphics/2848776 "2026-11-02T08:26:08Z")
Hi, I’m using Nsight Graphics 26.3 to optimize hardware lumen reflections. When captured a frame and located to lumen reflection region, I noticed that the Ray Tracing Traversal function is taking most of the total sampl… --- ## [Character mesh flies into the air (Root bone scales 5000x) when applying an IK Retargeting chain.](https://forums.unrealengine.com/t/character-mesh-flies-into-the-air-root-bone-scales-5000x-when-applying-an-ik-retargeting-chain/2846370)
**Author:** [@ee99b5c360994635bf8ef0a24897f92e](https://forums.unrealengine.com/u/ee99b5c360994635bf8ef0a24897f92e)\ **Replies:** 0\ **Last updated:** [October 28, 2026, 6:51pm UTC](https://forums.unrealengine.com/t/character-mesh-flies-into-the-air-root-bone-scales-5000x-when-applying-an-ik-retargeting-chain/2846370 "2026-10-28T18:51:07Z")
Hello everyone, I’m working on a third-person game project. I created a character in VRoid, modified it in Blender, and exported it as an FBX. However, I’m running into a severe issue. After importing the character’s FB… --- ## [Community Planet Creation: Research/Help](https://forums.unrealengine.com/t/community-planet-creation-research-help/136378)
**Author:** [@ATLAS8Mira](https://forums.unrealengine.com/u/ATLAS8Mira)\ **Replies:** 11\ **Last updated:** [October 23, 2026, 9:02pm UTC](https://forums.unrealengine.com/t/community-planet-creation-research-help/136378 "2026-10-23T21:02:48Z")
Hello, I’m here to ask how to create a planet. Not the casual “How do I do this.” more of a “Can you help me research how to do this?” Before I explain any further I must explain what I mean. I’ve done months of diggi… --- ## [Can't download megascan materials in Twinmotion. ](https://forums.unrealengine.com/t/cant-download-megascan-materials-in-twinmotion/2844087)
**Author:** [@GreatEye8517](https://forums.unrealengine.com/u/GreatEye8517)\ **Replies:** 0\ **Last updated:** [October 22, 2026, 10:48pm UTC](https://forums.unrealengine.com/t/cant-download-megascan-materials-in-twinmotion/2844087 "2026-10-22T22:48:11Z")
Why can’t I download megascan materials in Twinmotion? I hit the down arrow and nothing happens. --- ## [Predict Projectile Path - is there a way to have it incorporate Linear Damping?](https://forums.unrealengine.com/t/predict-projectile-path-is-there-a-way-to-have-it-incorporate-linear-damping/157798)
**Author:** [@Ponyo\_Wants\_Ham](https://forums.unrealengine.com/u/Ponyo_Wants_Ham)\ **Replies:** 5\ **Last updated:** [October 21, 2026, 3:55pm UTC](https://forums.unrealengine.com/t/predict-projectile-path-is-there-a-way-to-have-it-incorporate-linear-damping/157798 "2026-10-21T15:55:59Z")
I’m working on a golf game (blueprints only at the moment) and want to show the projected path of the ball before the player swings. Predict Projectile Path works beautifully for this… or it would, if only it could take … --- ## [Bug en la misión de caza (skin del mono) ](https://forums.unrealengine.com/t/bug-en-la-mision-de-caza-skin-del-mono/2843065)
**Author:** [@malicia7077](https://forums.unrealengine.com/u/malicia7077)\ **Replies:** 0\ **Last updated:** [October 20, 2026, 8:12pm UTC](https://forums.unrealengine.com/t/bug-en-la-mision-de-caza-skin-del-mono/2843065 "2026-10-20T20:12:27Z")
Hola, tengo un problema con el modificador «La caza» en el modo Recarga: Isla Pesadilla. El modificador aparece como activado, pero no me marca ningún objetivo. He jugado muchas partidas y sigue sin funcionar, por lo qu… --- ## [Website breaking/ account compromised ](https://forums.unrealengine.com/t/website-breaking-account-compromised/2842961)
**Author:** [@FormalOcelot5491](https://forums.unrealengine.com/u/FormalOcelot5491)\ **Replies:** 0\ **Last updated:** [October 20, 2026, 5:58pm UTC](https://forums.unrealengine.com/t/website-breaking-account-compromised/2842961 "2026-10-20T17:58:55Z")
What Type of Bug are you experiencing? URGENT: Your main support website (://epicgames.com) is entirely broken and permanently loops me back to the homepage on all devices, completely blocking me from submitting a compro… --- ## [Get Insights working with Quest 2 and UE5](https://forums.unrealengine.com/t/get-insights-working-with-quest-2-and-ue5/529386)
**Author:** [@fsk](https://forums.unrealengine.com/u/fsk)\ **Replies:** 4\ **Last updated:** [October 20, 2026, 3:28am UTC](https://forums.unrealengine.com/t/get-insights-working-with-quest-2-and-ue5/529386 "2026-10-20T03:28:05Z")
Does Anyone know? I did all the things i did for 4.27 (open adb ports and adding commands to the UECommandLine.txt) but no luck. It newer connects… --- ## [【求助】UE5.7 .4纯蓝图项目打包 Windows 一直卡在 网络超时与SDK，断网、禁插件、改配置均无效 ](https://forums.unrealengine.com/t/ue5-7-4-windows-sdk/2837421)
**Author:** [@\_5143](https://forums.unrealengine.com/u/_5143)\ **Replies:** 0\ **Last updated:** [October 5, 2026, 3:44pm UTC](https://forums.unrealengine.com/t/ue5-7-4-windows-sdk/2837421 "2026-10-05T15:44:29Z")
问题描述 我在使用 UE 5.7.4（Epic Launcher 版） 打包 Windows 平台项目时，打包进度一直卡在 网络访问/ SDK 验证阶段，无法进入真正的编译和打包流程。 具体表现为： 打包时弹出 SDK 验证窗口，虽然可以这个强制打包，但因为引擎一直在尝试访问谷歌还是某服务器但一直超时导致无法继续。 如果去更新SDK的话它又一直还是这个在访问无谷歌还是某服务器导致一直超时无法进行更新，刷新平台也一直在查询中没有任何… --- ## [Control Binding working in one Mapping Context but not another](https://forums.unrealengine.com/t/control-binding-working-in-one-mapping-context-but-not-another/2835433)
**Author:** [@dragonice501](https://forums.unrealengine.com/u/dragonice501)\ **Replies:** 1\ **Last updated:** [October 5, 2026, 2:48pm UTC](https://forums.unrealengine.com/t/control-binding-working-in-one-mapping-context-but-not-another/2835433 "2026-10-05T14:48:56Z")
I’m using Left Mouse Click and Gamepad Face Bottom to confirm/select things in my game. The gamepad face button is triggering in one mapping context but not the other, but the mouse click works for both. --- ## [How do i make Unreal Engine use less RAM ](https://forums.unrealengine.com/t/how-do-i-make-unreal-engine-use-less-ram/2832726)
**Author:** [@arvin139221](https://forums.unrealengine.com/u/arvin139221)\ **Replies:** 1\ **Last updated:** [September 29, 2026, 9:46pm UTC](https://forums.unrealengine.com/t/how-do-i-make-unreal-engine-use-less-ram/2832726 "2026-09-29T21:46:09Z")
Im using Unreal Engine + C++ and the unreal Engine alone with an empty scene is using 5GB while VS Code is using 500MB and i want Unreal to use 3GB is there any easy option to optimise Unreal Engine through project setti… --- ## [\[UE 5.8\]\[zh-Hans\]\[CommonUI\] “Normal” button state is incorrectly translated as “法线” ](https://forums.unrealengine.com/t/ue-5-8-zh-hans-commonui-normal-button-state-is-incorrectly-translated-as/2834068)
**Author:** [@WANG\_JIAPENG](https://forums.unrealengine.com/u/WANG_JIAPENG)\ **Replies:** 0\ **Last updated:** [September 24, 2026, 8:28pm UTC](https://forums.unrealengine.com/t/ue-5-8-zh-hans-commonui-normal-button-state-is-incorrectly-translated-as/2834068 "2026-09-24T20:28:25Z")
Engine Version: Unreal Engine 5.8.2, Launcher binary build Language: Simplified Chinese (zh-Hans) Description: In a Blueprint class derived from CommonButtonStyle, the “Normal” button state is translated as “法线”. “… --- ## [UE 5.8 - Ray Tracing Geometry budget shows 15.999 EiB, warnings always fire (bug?) ](https://forums.unrealengine.com/t/ue-5-8-ray-tracing-geometry-budget-shows-15-999-eib-warnings-always-fire-bug/2733927)
**Author:** [@KKo](https://forums.unrealengine.com/u/KKo)\ **Replies:** 3\ **Last updated:** [September 15, 2026, 6:14pm UTC](https://forums.unrealengine.com/t/ue-5-8-ray-tracing-geometry-budget-shows-15-999-eib-warnings-always-fire-bug/2733927 "2026-09-15T18:14:43Z")
I keep getting these warnings on screen: RAY TRACING GEOMETRY - ALWAYS RESIDENT MEMORY EXCEEDS 50% OF THE BUDGET (243 MiB / 15.999 EiB) RAY TRACING GEOMETRY - REQUESTED MEMORY OVER BUDGET 247 MiB / 15.999 EiB The budg… --- ## [Nanite Performance is Not Better than Overdraw Focused LODs \[TEST RESULTS\]. Epic's Documentation is Dangering Optimization.](https://forums.unrealengine.com/t/nanite-performance-is-not-better-than-overdraw-focused-lods-test-results-epics-documentation-is-dangering-optimization/1263218)
**Author:** [@TheKJ](https://forums.unrealengine.com/u/TheKJ)\ **Replies:** 449\ **Last updated:** [September 14, 2026, 8:41pm UTC](https://forums.unrealengine.com/t/nanite-performance-is-not-better-than-overdraw-focused-lods-test-results-epics-documentation-is-dangering-optimization/1263218 "2026-09-14T20:41:23Z")
!!!UPDATED MEGA THREAD!!! This post has been updated to include every major performance test against LODs posted through the current 142 post included here. There is no need for mindless scrolling over opinions and argu… --- ## [Where should I be looking from error messages like this for debugging?](https://forums.unrealengine.com/t/where-should-i-be-looking-from-error-messages-like-this-for-debugging/2728190)
**Author:** [@BigDonnyCalTTV](https://forums.unrealengine.com/u/BigDonnyCalTTV)\ **Replies:** 1\ **Last updated:** [September 11, 2026, 7:00pm UTC](https://forums.unrealengine.com/t/where-should-i-be-looking-from-error-messages-like-this-for-debugging/2728190 "2026-09-11T19:00:20Z")
Hello, I know this might be quite vague as of course I don’t have my script attached to this post and thus not sharing exactly what UE is referencing here but here is the scenario: I have repetitively had this error mess… --- ## [Missing Network Profiler executable ](https://forums.unrealengine.com/t/missing-network-profiler-executable/2763732)
**Author:** [@uantalt](https://forums.unrealengine.com/u/uantalt)\ **Replies:** 1\ **Last updated:** [September 11, 2026, 6:52pm UTC](https://forums.unrealengine.com/t/missing-network-profiler-executable/2763732 "2026-09-11T18:52:14Z")
Hello, it looks like the NetworkProfiler is absent from latest release (checked on 5.6 & 5.8), but was still present in 5.4, and working with capture from 5.6. The documentation of 5.8 is still talking about it (here: Us… --- ## [Upload crash at 5% ](https://forums.unrealengine.com/t/upload-crash-at-5/2764528)
**Author:** [@ObsceneCobra6215](https://forums.unrealengine.com/u/ObsceneCobra6215)\ **Replies:** 0\ **Last updated:** [September 10, 2026, 7:15pm UTC](https://forums.unrealengine.com/t/upload-crash-at-5/2764528 "2026-09-10T19:15:41Z")
The upload crash Every Time at 5% so im not able to proced my scan. Could you help ? --- ## [\[UE5\] Compiling Shaders On Every Startup](https://forums.unrealengine.com/t/ue5-compiling-shaders-on-every-startup/520971)
**Author:** [@MattDeakin](https://forums.unrealengine.com/u/MattDeakin)\ **Replies:** 37\ **Last updated:** [September 4, 2026, 5:57pm UTC](https://forums.unrealengine.com/t/ue5-compiling-shaders-on-every-startup/520971 "2026-09-04T17:57:14Z")
Hey! I started learning UE5 last week just before the release the other day (I’ve since updated to the latest version). Since starting I’ve noticed it says “compiling shaders”. I tried to look into this more but most of … --- ## [Web browser super low fps](https://forums.unrealengine.com/t/web-browser-super-low-fps/467552)
**Author:** [@Squeaky-Bed](https://forums.unrealengine.com/u/Squeaky-Bed)\ **Replies:** 7\ **Last updated:** [August 27, 2026, 12:42pm UTC](https://forums.unrealengine.com/t/web-browser-super-low-fps/467552 "2026-08-27T12:42:14Z")
So I have been testing the web browser widget and I found out that no matter what I load into it, It’s running at an average of 15 fps when my game is running at a locked 30 fps. Even in an empty project, I get the same… --- ## [How to remove "PROFILING..." debug text](https://forums.unrealengine.com/t/how-to-remove-profiling-debug-text/292761)
**Author:** [@skeleton60](https://forums.unrealengine.com/u/skeleton60)\ **Replies:** 10\ **Last updated:** [August 26, 2026, 10:57am UTC](https://forums.unrealengine.com/t/how-to-remove-profiling-debug-text/292761 "2026-08-26T10:57:12Z")
Hey i probably did a wrong console command but i have now two message in red color each time i test my game from the editor “PROFILING WITH AI LOGGING ON!” and “PROFILING WITH GC VERIFY ON!” is there any command to rem… --- ## [Errores y problemas durante torneo shadow mobile ](https://forums.unrealengine.com/t/errores-y-problemas-durante-torneo-shadow-mobile/2746447)
**Author:** [@Aleksis\_xd](https://forums.unrealengine.com/u/Aleksis_xd)\ **Replies:** 0\ **Last updated:** [August 25, 2026, 5:42pm UTC](https://forums.unrealengine.com/t/errores-y-problemas-durante-torneo-shadow-mobile/2746447 "2026-08-25T17:42:22Z")
El dia de hoy 21 de agosto tuve muchos bugs y probablemas durante el torneo de shadow recarga en moviles que menimpidieron desarrollarme y ganar los suficientes puntos para clasificar dando por consiguiente no poder cons… --- ## [UE重启后原有Actor静态网格体为何被系统自动卸载？ ](https://forums.unrealengine.com/t/ue-actor/2746323)
**Author:** [@CorrectRain3458](https://forums.unrealengine.com/u/CorrectRain3458)\ **Replies:** 0\ **Last updated:** [August 25, 2026, 11:37am UTC](https://forums.unrealengine.com/t/ue-actor/2746323 "2026-08-25T11:37:26Z")
在UE5.8中建了一个山洞，保存后再重启UE时，原有的多个Actor静态网格体被自动卸载了，不知道是什么原因，如何能避免这种情况发生？ --- ## [A link between Asset Audit and Property matrix](https://forums.unrealengine.com/t/a-link-between-asset-audit-and-property-matrix/2745389)
**Author:** [@Mr\_Tegs](https://forums.unrealengine.com/u/Mr_Tegs)\ **Replies:** 0\ **Last updated:** [August 20, 2026, 5:56pm UTC](https://forums.unrealengine.com/t/a-link-between-asset-audit-and-property-matrix/2745389 "2026-08-20T17:56:50Z")
When I’m auditing my project, i see alot of textures that I want to optimize by changing their LOD bias, and the best way to do that is via Bulk edit via property matrix, but its not an option to do that in the Audit con… --- ## [Shader compile error after enabling LumenRef in UE6 main](https://forums.unrealengine.com/t/shader-compile-error-after-enabling-lumenref-in-ue6-main/2744148)
**Author:** [@eco\_bach2](https://forums.unrealengine.com/u/eco_bach2)\ **Replies:** 0\ **Last updated:** [August 16, 2026, 2:05pm UTC](https://forums.unrealengine.com/t/shader-compile-error-after-enabling-lumenref-in-ue6-main/2744148 "2026-08-16T14:05:10Z")
Exploring the new LumenRef mode in UE6 main. After compiling the source without errors the editor launches fine without errors. However after enabling LumenRef by entering the following in DefaultEngine.ini r.LumenRef… --- ## [vulkan device not be created at the project supported ](https://forums.unrealengine.com/t/vulkan-device-not-be-created-at-the-project-supported/2742734)
**Author:** [@1blackwolf23](https://forums.unrealengine.com/u/1blackwolf23)\ **Replies:** 0\ **Last updated:** [August 11, 2026, 3:41am UTC](https://forums.unrealengine.com/t/vulkan-device-not-be-created-at-the-project-supported/2742734 "2026-08-11T03:41:27Z")
To resolve the issue, go to the project, open DefaultEngine.ini, locate the \[/Script/Engine.RendererSettings\] section, and copy and paste the contents. \[/Script/Engine.RendererSettings\] r.ReflectionMethod=1 r.Gener… --- ## [Требуется помощь в консультации по вопросам авторских прав в UEFN. ](https://forums.unrealengine.com/t/uefn/2742688)
**Author:** [@AitronSeel](https://forums.unrealengine.com/u/AitronSeel)\ **Replies:** 0\ **Last updated:** [August 10, 2026, 7:37pm UTC](https://forums.unrealengine.com/t/uefn/2742688 "2026-08-10T19:37:07Z")
Hello, Epic Games team. I am part of a team that has been developing a Persona 5-inspired map in UEFN for the past year. We are creating a social hub where players can meet new friends and interact within familiar Toky… [Next page](https://forums.unrealengine.com/c/development-discussion/platforms/debugging-optimization-profiling/134.md?page=1)