# Programming & Scripting **URL:** https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=17 [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) **Page:** 18 --- ## [UCX collision is working but not completely visible](https://forums.unrealengine.com/t/ucx-collision-is-working-but-not-completely-visible/2832679)
**Author:** [@mckay421](https://forums.unrealengine.com/u/mckay421)\ **Replies:** 4\ **Last updated:** [October 14, 2026, 4:24pm UTC](https://forums.unrealengine.com/t/ucx-collision-is-working-but-not-completely-visible/2832679 "2026-10-14T16:24:37Z")
UCX files imported from blender --- ## [\[Blueprints\] How to add delegate parameter to interface function?](https://forums.unrealengine.com/t/blueprints-how-to-add-delegate-parameter-to-interface-function/479965)
**Author:** [@Joseph\_Fawzy](https://forums.unrealengine.com/u/Joseph_Fawzy)\ **Replies:** 12\ **Last updated:** [October 14, 2026, 4:17pm UTC](https://forums.unrealengine.com/t/blueprints-how-to-add-delegate-parameter-to-interface-function/479965 "2026-10-14T16:17:37Z")
Hi We are trying to move our implementation to the “Implement to interfaces” paradigm, where everything is an implementation on an interface Interfaces cannot have “event dispatchers”, so we tried to pass the event to … --- ## [QOL Sequencer Feature Request ](https://forums.unrealengine.com/t/qol-sequencer-feature-request/2778325)
**Author:** [@Slaner](https://forums.unrealengine.com/u/Slaner)\ **Replies:** 1\ **Last updated:** [October 14, 2026, 3:41pm UTC](https://forums.unrealengine.com/t/qol-sequencer-feature-request/2778325 "2026-10-14T15:41:13Z")
I would love if selected actors in sequencer were automatically put into a new folder as you create it instead of having to manually put the into the folder after creating it. This already works well in the outline but n… --- ## [GameAnimationSample 5.8 bad retargeting to metahuman](https://forums.unrealengine.com/t/gameanimationsample-5-8-bad-retargeting-to-metahuman/2837097)
**Author:** [@user\_0f9cca0911c97a03037a165ca737773c707a7f958aad4ec678e96b](https://forums.unrealengine.com/u/user_0f9cca0911c97a03037a165ca737773c707a7f958aad4ec678e96b)\ **Replies:** 3\ **Last updated:** [October 14, 2026, 3:35pm UTC](https://forums.unrealengine.com/t/gameanimationsample-5-8-bad-retargeting-to-metahuman/2837097 "2026-10-14T15:35:43Z")
I’m using the latest Game Animation Sample in UE 5.8 and I’m running into a persistent wrist/hand rotation issue with MetaHumans. The problem is very specific: The MetaHuman body retargets correctly overall. Locom… --- ## [Making a spectator button with features ](https://forums.unrealengine.com/t/making-a-spectator-button-with-features/2838342)
**Author:** [@GXBZW\_1v1\_map](https://forums.unrealengine.com/u/GXBZW_1v1_map)\ **Replies:** 1\ **Last updated:** [October 14, 2026, 2:20pm UTC](https://forums.unrealengine.com/t/making-a-spectator-button-with-features/2838342 "2026-10-14T14:20:23Z")
Hello everyone, I have been using UEFN since about a week now and am trying to start making my oiwn maps, staring with simple 1v1s. But I have a problem I need help with making a verse and setting it up for a spectator … --- ## [Mesh gets distorted/decimated at runtime](https://forums.unrealengine.com/t/mesh-gets-distorted-decimated-at-runtime/2840076)
**Author:** [@Skyboy](https://forums.unrealengine.com/u/Skyboy)\ **Replies:** 7\ **Last updated:** [October 14, 2026, 1:30pm UTC](https://forums.unrealengine.com/t/mesh-gets-distorted-decimated-at-runtime/2840076 "2026-10-14T13:30:54Z")
My mesh gets what looks to be decimated at runtime. In blender/Staticmesh editior and the blueprint it looks fine. Ive been through what feels like everything, Anyone got any ideas? --- ## [Top AI Engineering Companies](https://forums.unrealengine.com/t/top-ai-engineering-companies/2840309)
**Author:** [@CarolHill3855](https://forums.unrealengine.com/u/CarolHill3855)\ **Replies:** 0\ **Last updated:** [October 14, 2026, 12:05pm UTC](https://forums.unrealengine.com/t/top-ai-engineering-companies/2840309 "2026-10-14T12:05:39Z")
AI engineering is the practice of designing, building, integrating, deploying, and maintaining artificial intelligence systems for practical business applications. It brings together machine learning, data engineering, s… --- ## [Issue with blueprint interface](https://forums.unrealengine.com/t/issue-with-blueprint-interface/2840297)
**Author:** [@JasonKorda](https://forums.unrealengine.com/u/JasonKorda)\ **Replies:** 1\ **Last updated:** [October 14, 2026, 10:54am UTC](https://forums.unrealengine.com/t/issue-with-blueprint-interface/2840297 "2026-10-14T10:54:25Z")
Hey! I made an bp interface for the interaction system of my project, which used to work like this: Player looks at interactable actor, triggers a widget in the world to tell the player they can interact with the actor,… --- ## [UE 5.8.3 packaged project full screen has hitches](https://forums.unrealengine.com/t/ue-5-8-3-packaged-project-full-screen-has-hitches/2837894)
**Author:** [@ArnoldPopescu](https://forums.unrealengine.com/u/ArnoldPopescu)\ **Replies:** 5\ **Last updated:** [October 14, 2026, 7:13am UTC](https://forums.unrealengine.com/t/ue-5-8-3-packaged-project-full-screen-has-hitches/2837894 "2026-10-14T07:13:30Z")
Hi everyone! I keep running into hitches in my project packaged in Unreal Engine 5.8.3 while in true fullscreen mode (even in a clean Third Person Template project). PC specs: Processor: 13th Gen Intel(R) Core™ i9-139… --- ## [Set Input Mode to Game Only not working](https://forums.unrealengine.com/t/set-input-mode-to-game-only-not-working/2839895)
**Author:** [@Overseeing\_Industry](https://forums.unrealengine.com/u/Overseeing_Industry)\ **Replies:** 2\ **Last updated:** [October 14, 2026, 6:16am UTC](https://forums.unrealengine.com/t/set-input-mode-to-game-only-not-working/2839895 "2026-10-14T06:16:28Z")
I am trying to remove the Object menu HUD I made, and regain control of the character, but after using the Set Input Game Only, its acting like Game and UI, but weird. The camera follows my mouse until I click, then it b… --- ## [How to make progress bar follow custom path? ](https://forums.unrealengine.com/t/how-to-make-progress-bar-follow-custom-path/2839765)
**Author:** [@ZankokuZero](https://forums.unrealengine.com/u/ZankokuZero)\ **Replies:** 2\ **Last updated:** [October 14, 2026, 5:53am UTC](https://forums.unrealengine.com/t/how-to-make-progress-bar-follow-custom-path/2839765 "2026-10-14T05:53:03Z")
Hi Unreal People! I’m chipping away at learning unreal as a UI Designer / Artist. However, how can I get a progress bar to follow a custom path like in Kingdom hearts? I know I need to make a texture/shader and/or mate… --- ## [Title: NPC AI StateTree logic: Guard not responding or attacking empty air (GAS + C++ Architecture) ](https://forums.unrealengine.com/t/title-npc-ai-statetree-logic-guard-not-responding-or-attacking-empty-air-gas-c-architecture/2839456)
**Author:** [@Arc\_Michael0988](https://forums.unrealengine.com/u/Arc_Michael0988)\ **Replies:** 2\ **Last updated:** [October 14, 2026, 5:51am UTC](https://forums.unrealengine.com/t/title-npc-ai-statetree-logic-guard-not-responding-or-attacking-empty-air-gas-c-architecture/2839456 "2026-10-14T05:51:26Z")
Title: NPC AI StateTree logic: Guard not responding or attacking empty air (GAS + C++ Architecture) Hi everyone, I’m working on a Guard AI system in Unreal Engine 5.8 using StateTrees, AI Perception, and the Gameplay A… --- ## [Modular tree using HISM ](https://forums.unrealengine.com/t/modular-tree-using-hism/2836909)
**Author:** [@putuoshan](https://forums.unrealengine.com/u/putuoshan)\ **Replies:** 2\ **Last updated:** [October 14, 2026, 2:58am UTC](https://forums.unrealengine.com/t/modular-tree-using-hism/2836909 "2026-10-14T02:58:34Z")
I am creating a modular tree in Unreal Engine 5.7.4. Nanite is turned on. I have several (approx. 10) trunks, branches and branchlets which should be used randomly. I have made them in Blender and I have their splines i… --- ## [Make user widget auto-scale](https://forums.unrealengine.com/t/make-user-widget-auto-scale/2840090)
**Author:** [@ViaCognita](https://forums.unrealengine.com/u/ViaCognita)\ **Replies:** 1\ **Last updated:** [October 14, 2026, 12:51am UTC](https://forums.unrealengine.com/t/make-user-widget-auto-scale/2840090 "2026-10-14T00:51:24Z")
Hi! I’ve just trying to create an user widget with some help Do you know if there is a way to make this user widget auto-scale? I don’t know how to do it. For example, with the images I have to set their size manua… --- ## [Unreal Engine 5.8.3 and 5.7.3 cannot be installed – stuck on Initializing ](https://forums.unrealengine.com/t/unreal-engine-5-8-3-and-5-7-3-cannot-be-installed-stuck-on-initializing/2835738)
**Author:** [@Arslan\_Akhmad](https://forums.unrealengine.com/u/Arslan_Akhmad)\ **Replies:** 2\ **Last updated:** [October 13, 2026, 10:56pm UTC](https://forums.unrealengine.com/t/unreal-engine-5-8-3-and-5-7-3-cannot-be-installed-stuck-on-initializing/2835738 "2026-10-13T22:56:18Z")
Hello, we are experiencing an issue installing Unreal Engine on a Windows company PC. Unreal Engine 5.8.3 was stuck on “Initializing” for several days and could not be cancelled. We then uninstalled and reinstalled the… --- ## [Will UE4 or UE5 be better for me?](https://forums.unrealengine.com/t/will-ue4-or-ue5-be-better-for-me/2839930)
**Author:** [@OJCAT\_YT](https://forums.unrealengine.com/u/OJCAT_YT)\ **Replies:** 2\ **Last updated:** [October 13, 2026, 3:19pm UTC](https://forums.unrealengine.com/t/will-ue4-or-ue5-be-better-for-me/2839930 "2026-10-13T15:19:57Z")
Sorry if this is the wrong category; I couldn’t find a better one. First of all, I would like the games I make to be able to run pretty well, even on very old hardware. In ue5, I know you can disable lumen and nanite an… --- ## [Package metadata FSoftObjectPaths not updated when using Update Redirector References ](https://forums.unrealengine.com/t/package-metadata-fsoftobjectpaths-not-updated-when-using-update-redirector-references/2854412)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 3\ **Last updated:** [October 13, 2026, 3:00pm UTC](https://forums.unrealengine.com/t/package-metadata-fsoftobjectpaths-not-updated-when-using-update-redirector-references/2854412 "2026-10-13T15:00:28Z")
I’m not sure how metadata gets added to a package, but if you start with an asset A whose package contains metadata (UPackage::MetaData) that is keyed off an asset B and then: Move B to location C, leaving behind a red… --- ## [Server Crash From Client Sending Bad Packets? In IRIS ](https://forums.unrealengine.com/t/server-crash-from-client-sending-bad-packets-in-iris/2854420)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 4\ **Last updated:** [October 13, 2026, 2:36pm UTC](https://forums.unrealengine.com/t/server-crash-from-client-sending-bad-packets-in-iris/2854420 "2026-10-13T14:36:26Z")
This has occured a few times in live for us, we have a mitigation on our side but hoping for a official epic solution. \[Attachment Removed\] --- ## [Jittery animation](https://forums.unrealengine.com/t/jittery-animation/2708601)
**Author:** [@LeoTMad1](https://forums.unrealengine.com/u/LeoTMad1)\ **Replies:** 6\ **Last updated:** [October 13, 2026, 1:31pm UTC](https://forums.unrealengine.com/t/jittery-animation/2708601 "2026-10-13T13:31:22Z")
Hello! I have just imported this animation (from Mixamo), but it looks all jittery when I play it… Is this something common anyone knows how to solve? It plays perfectly in blender, but has this shake when imported… --- ## [Mass processing queue vs game thread ](https://forums.unrealengine.com/t/mass-processing-queue-vs-game-thread/2854408)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 5\ **Last updated:** [October 13, 2026, 1:25pm UTC](https://forums.unrealengine.com/t/mass-processing-queue-vs-game-thread/2854408 "2026-10-13T13:25:12Z")
Hello, recently a massive change to mass processing queue was submitted - it no longer blocks main thread. I have originally disliked the idea of mass blocking the main thread, but have come since to rely on this featur… --- ## [How can I position right hand (hand\_r) in ALSCommunity(ALSv4)](https://forums.unrealengine.com/t/how-can-i-position-right-hand-hand-r-in-alscommunity-alsv4/2834479)
**Author:** [@Ruslanmin2](https://forums.unrealengine.com/u/Ruslanmin2)\ **Replies:** 1\ **Last updated:** [October 13, 2026, 10:49am UTC](https://forums.unrealengine.com/t/how-can-i-position-right-hand-hand-r-in-alscommunity-alsv4/2834479 "2026-10-13T10:49:36Z")
Hi, I would like in AnimBP to transform bone of hand\_r and move in y axis when overlay is Rifle also when Rotation Mode is Aiming. How to solve this problem? Please help me, I am using ALS Community c++ (based on ALSv4… --- ## [ue5.8.3 When I assign a MediaPlayer‑based material as a mask to a Plane, two Planes on the same dimension produce z‑fighting occlusion artifacts. ](https://forums.unrealengine.com/t/ue5-8-3-when-i-assign-a-mediaplayer-based-material-as-a-mask-to-a-plane-two-planes-on-the-same-dimension-produce-z-fighting-occlusion-artifacts/2835025)
**Author:** [@pittlee09](https://forums.unrealengine.com/u/pittlee09)\ **Replies:** 1\ **Last updated:** [October 13, 2026, 10:49am UTC](https://forums.unrealengine.com/t/ue5-8-3-when-i-assign-a-mediaplayer-based-material-as-a-mask-to-a-plane-two-planes-on-the-same-dimension-produce-z-fighting-occlusion-artifacts/2835025 "2026-10-13T10:49:26Z")
--- ## [I cannot create a project in D:/ ](https://forums.unrealengine.com/t/i-cannot-create-a-project-in-d/2836639)
**Author:** [@zczhaomobai](https://forums.unrealengine.com/u/zczhaomobai)\ **Replies:** 1\ **Last updated:** [October 13, 2026, 10:49am UTC](https://forums.unrealengine.com/t/i-cannot-create-a-project-in-d/2836639 "2026-10-13T10:49:12Z")
here is the report Running D:/UE\_5.8/Engine/Build/BatchFiles/Build.bat -projectfiles -project=“D:/Unreal Projects/ironandblood/ironandblood.uproject” -game -rocket -progress Using bundled DotNet SDK version: 10.0 win-… --- ## [How to get the Face Index and thus the Material from a Capsule Trace using UE5](https://forums.unrealengine.com/t/how-to-get-the-face-index-and-thus-the-material-from-a-capsule-trace-using-ue5/1171837)
**Author:** [@nameLive](https://forums.unrealengine.com/u/nameLive)\ **Replies:** 2\ **Last updated:** [October 13, 2026, 9:30am UTC](https://forums.unrealengine.com/t/how-to-get-the-face-index-and-thus-the-material-from-a-capsule-trace-using-ue5/1171837 "2026-10-13T09:30:11Z")
This is indeed possible and after much experimentation i figured out that if the Static Mesh is set to Double Geometry, and if using UE5, with trace complex set to true, you can get the face index if it’s a capsule trace… --- ## [VR UMG Slider - Can't drag, handle only "jumps" on click ](https://forums.unrealengine.com/t/vr-umg-slider-cant-drag-handle-only-jumps-on-click/2653016)
**Author:** [@chrz\_chrz](https://forums.unrealengine.com/u/chrz_chrz)\ **Replies:** 3\ **Last updated:** [October 13, 2026, 7:44am UTC](https://forums.unrealengine.com/t/vr-umg-slider-cant-drag-handle-only-jumps-on-click/2653016 "2026-10-13T07:44:14Z")
Hey everyone, I’m struggling with an issue regarding a UMG slider in my VR project (UE 5.6) and I’m hoping someone here might have an idea. To narrow it down i used the VR-Template and just added a slider to the widget… --- ## [How to understanding of the vertex data obtained from StaticMesh](https://forums.unrealengine.com/t/how-to-understanding-of-the-vertex-data-obtained-from-staticmesh/2839884)
**Author:** [@E\_Misalign](https://forums.unrealengine.com/u/E_Misalign)\ **Replies:** 1\ **Last updated:** [October 13, 2026, 5:42am UTC](https://forums.unrealengine.com/t/how-to-understanding-of-the-vertex-data-obtained-from-staticmesh/2839884 "2026-10-13T05:42:42Z")
Hello I obtain the vertex data of the static mesh using the blueprint, as shown in the following figure. The obtained vertex data is as follows LogBlueprintUserMessages: \[NewMap\_C\_4\] X=-50.000 Y=50.000 Z=0.000 … --- ## [Grab + Throw mechanic for unreal](https://forums.unrealengine.com/t/grab-throw-mechanic-for-unreal/2839762)
**Author:** [@Wulf\_Man](https://forums.unrealengine.com/u/Wulf_Man)\ **Replies:** 1\ **Last updated:** [October 13, 2026, 12:48am UTC](https://forums.unrealengine.com/t/grab-throw-mechanic-for-unreal/2839762 "2026-10-13T00:48:23Z")
Hi, so I’m trying to make a grab and throw mechanic for a game for class this week, but anything I’ve tried doesnt give the results i want. I wanna be able to pick up an item, throw it, then be able to pick it u… --- ## [Widgets in separate window has problem in custom tooltip background ](https://forums.unrealengine.com/t/widgets-in-separate-window-has-problem-in-custom-tooltip-background/2853847)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 3\ **Last updated:** [October 12, 2026, 10:17pm UTC](https://forums.unrealengine.com/t/widgets-in-separate-window-has-problem-in-custom-tooltip-background/2853847 "2026-10-12T22:17:31Z")
Hello guys, I am making a tool to spawn widgets in separated unreal window. The issue I am facing is that the custom tooltips of those widgets has a weird issue in their background. (video attached) It seems that the … --- ## [The "SetEnv" task failed unexpectedly](https://forums.unrealengine.com/t/the-setenv-task-failed-unexpectedly/2675115)
**Author:** [@COLD\_BLOOD4](https://forums.unrealengine.com/u/COLD_BLOOD4)\ **Replies:** 27\ **Last updated:** [October 12, 2026, 9:13pm UTC](https://forums.unrealengine.com/t/the-setenv-task-failed-unexpectedly/2675115 "2026-10-12T21:13:42Z")
I had just upgraded to UE 5.7 and Visual Studio 2026. I created a fresh new C++ project using the third person template. When I go to build the project in Visual Studio I keep getting this error: 1\>C:\\Program Files\\Micr… --- ## [Saving/loading external image during runtime?](https://forums.unrealengine.com/t/saving-loading-external-image-during-runtime/88397)
**Author:** [@Grimbleton](https://forums.unrealengine.com/u/Grimbleton)\ **Replies:** 3\ **Last updated:** [October 12, 2026, 8:26pm UTC](https://forums.unrealengine.com/t/saving-loading-external-image-during-runtime/88397 "2026-10-12T20:26:00Z")
Hi all. I’m looking to make a photograph/scrapbook feature for a game. Basically, the player has a camera and they can use it to take a screenshot of the game. The screenshot gets saved externally to a folder in the game… [Previous page](https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=16) [Next page](https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=18)