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Questions tagged [unreal-engine5]

Unreal Engine 5 is a game engine created by Epic Games, currently in Early access phase. Use this tag for programming related questions. For non-programming related questions, use https://gamedev.stackexchange.com/.

Unreal Engine 5 (UE5) is a game engine created by Epic Games.

Gameplay and engine programming is done in C++ and Blueprints.

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Passing in derived class to function base class parameter (UE5)

Simple question but perhaps Unreal Engine specific: I have UMyBaseClass and UMyDerivedClass, have defined a function as taking in UMyBaseClass as a parameter but, when trying to pass in UMyDerivedClass, I get the build error: "cannot convert…
Sean_M
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In UE5, how exactly can I create a cinematic camera which follows a vehicle with view from driver seat?

How exactly can I drive a vehicle in UE5 and have a camera in the driver view/seat? I'm attempting to use the Unreal Engine 5 Sample city demo, specifically the vehicle test map. From what I understand, this is a cinematic camera that would need to…
Judy007
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UE5 Crashing without reason EXCEPTION_ACCESS_VIOLATION reading address 0x00001ff003fe0030

My Unreal Engine is crashing over and over again. I have tried couple of things to fix it. I am using a RTX3080, latest driver, latest windows updates, latest unreal version. The problem is, that it keeps happening without any reason. Most of the…
Konrad Kunkel
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Unreal Engine 5 Assertion Failed

Im New to Unreal and i was starting my first project. when i clicked create i got this error: Assertion failed: InAllocationAlignment <= PoolAlignment [File:D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12PoolAllocator.cpp] [Line:…
Manit Aggarwal
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Unreal Engine 5 - Fire Particle assets look different when imported in an environment from unreal engine 4

I'm new to using unreal engine so please forgive my ignorance. Currently started and using unreal engine 5 i am Building a medivial scene and i imported the medvial project from unreal engine marketplace (It was made for unreal engine 4, but im…
Raymond Ativie
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Unreal Engine + Websocket + SSL Certificate

Here is an insallation I manage to create : Unreal Engine is a graphical video game engine. I've installed a plugin which can create a websocket server and a websocket client. So I can perfectly make communicate my web app on a smartphone with…
emilie zawadzki
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Why does my packaged game not launch in fullscreen unreal engine 5?

Whenever I launch my game in standalone mode or packaged, the game doesn't go fullscreen even if I press F11 (shortcut to fullscreen / windowed mode). Here's a demo of the problem : youtube link If I put in the console r.SetRes 1920x1080, then the…
Fire Frost
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How to use Eigen as third party library in Unreal Engine 5?

I'm trying to include Eigen in UE5 - there's some old UE4 documentation on this but it produces a different plugin file. It looks like UE5 includes Eigen under Engine/Source/ThirdParty/Eigen/, but the actual library does not seem to be there. So, I…
TheFaustie
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Why won't my Unreal 5 project build, even though visual studios does not detect any issues?

I'm brand spanking new to the Unreal engine, and only know a little c++, but I've been following this tutorial to the exact detail (asides from naming variables slightly different things, but I'm consistent so it doesn't…
AdamT
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Agora UE5 Android build Failed to extract native libraries for ARM64

I'm trying to use Agora with UE5 to build for Android devices, when trying to build for Windows it works properly. But for Android: I get the failed: [INSTALL_FAILED_NO_MATCHING_ABIS: Failed to extract native libraries, res=-113] error when building…
محمد خير الخلق
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Creating Static Meshes in For Loop using C++ with unreal engine

this is the fix at top use this to create a string that Static Mesh Object can accept as a unique identifier so the engine doesn't crash FName name = *FString::Printf(TEXT("Sphere %i"), i); I want to use a for Loop to create static meshes that I…
GSchian0
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UE5 SIGSEGV: invalid attempt to write memory at address 0x0000000000000003 Exception on Project Startup

I've just built Unreal Engine (release branch) from source on Fedora 34. Every time I try to open a Project it crashes with the SIGSEGV Exception. I saw on another post in the UE forums that it is fixed since 4.15, but this doesn't seem to be the…
fowl-ow
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UE5 EOSPlus ReadFriendsList Error EOS_Connect_QueryExternalAccountMappings EOS_InvalidParameters

developing using UE5 and EOS testing using EOS Plus at the moment, I have logging in working fine now with steam and EOS (just as a test), my steam account is linked to my epic games account, however when I call the ReadFriendsList api with the code…
Saragan
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Epic Online Services errors.com.epicgames.common.policy_missing_action

been experimenting with UE5 and EOS I havent filled in the branding section completely in the dev portal for EOS (in draft) as I dont have a policy or game logo I have the game logging in fine (using accountportal) and that returns success and I get…
Saragan
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Create Root Component in C++ Constructor using Blueprint Variable

How to create a root component based on which mesh variable was set in BP e.g. I want to use the constructor to set a root but the BP variable doesn't exist. Creating the components in postinit works but the components are not visible in the editor…
xmxmxmx
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