Epic Developer Community Forums

Topic	Replies	Views	Activity
Instanced static mesh vertex animations break when being rotated via the "update instance transform node" but not via other methods of rotation. Asset Creation question , unreal-engine , Epic-Pro-Support	10	100	July 30, 2025
How to spawn a scenegraph entity prefab Verse question , fortnite , unreal-editor-for-fortnite , fortnite-creative	9	109	January 20, 2026
GPU crash DXGI_ERROR_INVALID_CALL (Command lists must be successfully closed before execution) Rendering question , unreal-engine , Epic-Pro-Support	9	106	December 23, 2025
I want to use on button clicked to activate a function. UI Blueprint , question , unreal-engine	9	119	December 3, 2025
When exporting static meshes with bExportSourceMesh enabled, there is a problem where all UVs are fragmented. Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	9	112	September 22, 2025
Is there a way to set the player's maximum movement speed? The maximum speed limit seems to be 2000cm/s. Feedback & Requests question , fortnite , unreal-editor-for-fortnite , fortnite-creative	9	122	January 19, 2026
Cant spheretrace/linetrace any spawned (at runtime) Actors Programming & Scripting Blueprint , question , unreal-engine	9	105	November 2, 2025
I can't playtest my map Issues and Bug Reporting unreal-engine	23	120	February 26, 2026
我本地尝试使用World Partition的Builder，在RunInternal函数写了一些获取场景渲染信息的功能，但是调试发现场景的Actor都可以加载，但是没有渲染相关的数据，比如导不出screenshot，viewport为空等问题，像是渲染逻辑没有启动，不知道哪里的参数设置有问题，想问下有没有一个用world partition加载地图，在commandlet下烘焙反射球的例子可以参考一下，非常感谢！ Rendering question , unreal-engine , Epic-Pro-Support	12	90	July 24, 2025
Using weapons while invisible with the cloak gauntlets Issues and Bug Reporting fortnite , closed	9	116	March 23, 2026
Android如何在Custom Node里面使用高精度float Asset Creation question , unreal-engine , Epic-Pro-Support	9	104	September 29, 2025
Intermittent Cook Error "object was stripped out of the target package when saved" Programming & Scripting question , unreal-engine , Epic-Pro-Support	9	102	July 18, 2025
DataPrep creates multiple paths Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	9	103	July 14, 2025
Server Crash in GatherNavigationDataGeometry after integrating 5.5 Programming & Scripting question , unreal-engine , Epic-Pro-Support	11	96	January 19, 2026
Issue with animating bone in AnimationSequence Editor Character & Animation question , unreal-engine , Epic-Pro-Support	11	91	May 9, 2025
Help with Tomb Raider jump mechanic Blueprint Blueprint , question , unreal-engine	13	101	January 14, 2026
bullet goes backwards when aiming up Blueprint Blueprint , question , CPP , unreal-engine	9	125	September 18, 2025
Preventing Angular Motor Rotation of axles from rotating entire vehicle Blueprint question , unreal-engine	19	96	March 16, 2026
[CRITICAL] Launching Session Error – “At least 1 module failed remote validation" Issues and Bug Reporting bug-report , session , fortnite , unreal-editor-for-fortnite , fortnite-creative , UEFN , fixed	11	127	March 26, 2026
Rare crash during assignment of Instance.Montage.MarkersPassedThisTick Character & Animation question , unreal-engine , Epic-Pro-Support	10	100	June 18, 2025
Availability Direct Link plugin for the new ArchiCAD 29 Pipeline & Plugins question , twinmotion	8	630	January 7, 2026
Physics collision issues after 40.00 update - objects tunneling through walls Issues and Bug Reporting bug-report , fortnite , unreal-editor-for-fortnite , fortnite-creative , fixed	9	145	April 1, 2026
DamagedEvent doesn’t work in runtime Issues and Bug Reporting bug-report , unreal-engine , fortnite , unreal-editor-for-fortnite , fortnite-creative , closed	9	112	January 13, 2026
Stat Counter resets every time. Feedback & Requests question , fortnite , unreal-editor-for-fortnite , fortnite-creative	9	112	December 13, 2025
UBA - Agent not finishing (due to Zone?) Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	10	95	October 16, 2025
Excessively long waiting time for discovering asset data Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	20	78	February 6, 2026
Launch session - Cook failure out of memory Issues and Bug Reporting fortnite , unreal-editor-for-fortnite , fortnite-creative , fixed	10	145	April 4, 2026
Pawn affetced by Geometry Collection Collision Asset Creation question , unreal-engine , Epic-Pro-Support	10	102	August 14, 2025
How do I make a souls like lock on and target switching sysem? Programming & Scripting Blueprint , question , unreal-engine	16	103	February 22, 2026
Static analysis intermittently fails when UBA cache is in use Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	15	77	November 25, 2025
Problem opening old files - Error 5098 Community & Industry Discussion realityscan	9	114	November 24, 2025
I want AI to move when I press the start button C++ question , unreal-engine	10	113	April 11, 2025
Has the scrollable text block not been added ??? Issues and Bug Reporting fortnite , unreal-editor-for-fortnite , fortnite-creative	9	108	November 1, 2025
Importing ANY audio file (even audio files that used to work) into unreal engine 5.4 project makes them have 0 seconds duration Audio question , bug-report , unreal-engine	10	100	January 22, 2026
(Bug?). I can't open a file with the media player trough a UI. Programming & Scripting question , bug-report , unreal-engine , files	18	83	March 27, 2026
PCG Builder Stall while IsGenerating() Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	18	70	December 3, 2025
[Major] Vehicle HUD cannot be hidden for the rocket racing car Issues and Bug Reporting open , fortnite , unreal-editor-for-fortnite , fortnite-creative	9	132	April 4, 2026
Populating meshes exactly along spline points - but adding gaps Programming & Scripting question , unreal-engine	9	121	October 20, 2025
Logic error in FCompressedAnimSequence::IsBoneDataValid Character & Animation question , unreal-engine , Epic-Pro-Support	9	97	August 14, 2025
Cooking iOS on Windows with Metal Developer Tools results in a Success from the Cook, but app crashes on boot Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	14	83	November 25, 2025
XCode project generator not adding sound files for notifications Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	9	97	September 17, 2025
Camera rectificaction returns large camera dimensions Asset Creation question , unreal-engine , Epic-Pro-Support	17	71	December 3, 2025
Lumen Hardware Ray Tracing Crash Rendering question , unreal-engine , Epic-Pro-Support	16	76	December 15, 2025
local pitch, yaw, and roll for player controller Programming & Scripting question , unreal-engine	10	122	March 1, 2026
Multiplayer setup not updating the variables as intended. Programming & Scripting Blueprint , question , Multiplayer , unreal-engine	10	109	January 21, 2026
Players don't always load in with a Pickaxe Issues and Bug Reporting open , fortnite , unreal-editor-for-fortnite , fortnite-creative	11	113	March 12, 2026
I need help with this configuration and VS Code. The built-in AI isn't helping me. Programming & Scripting question , fortnite , unreal-editor-for-fortnite , fortnite-creative	9	129	January 7, 2026
Nanite Landscape never fully excluded from GI even with r.DisableLandscapeNaniteGI enabled Rendering question , unreal-engine , Epic-Pro-Support	9	94	September 29, 2025
UnrealGameSync sync failure after enabling USDImporter plugin Pipeline & Plugins question , unreal-engine , Epic-Pro-Support	9	95	June 12, 2025
Any way to detect a closed area for checking if player is stucked in it? Programming & Scripting question , unreal-engine , Epic-Pro-Support	17	73	January 14, 2026