Questions tagged [unreal-4]

Unreal Engine 4 is a professional suite of tools and technologies used for building high-quality games across a range of platforms.

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UE4 Cannot find moved files causing a crash when opening a level

Moved blueprints cannot be find in new location, Unreal Engine still searching them in old folder. This cause the editor to crash when trying to open a specific level. The log error is the following: <...
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Unreal Engine 4: The Motion axises values is always zero

I'm trying to add aiming by gyroscope to my game. In the controller's module I parsed gyro/accel data and get the processed axis values, that I send into engine: ...
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How to create good scratched film effect in UE4?

I am messing with 8mm old film effect post process for a while in unreal engine 4. I have set up the material, but the effect just looks so wrong. I have heard you can make scratched film effect with ...
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25 views

Easy code to make object raise when collecting item? (new coder)

Trying to make the statue (queen) in the background raise from the ground when an item is collected (which currently just gets destroyed to show that) and having issues with timelines and assigning ...
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1answer
20 views

Blueprint can't pull a function from a Widget

I am working on a project and I am stumped on something and it is taking me to long to fix this issue. As seen above I am this is where I am, what I need to do is set up a widget text that changes by ...
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1answer
14 views

How to snap a point to the height of the navmesh surface?

I'm making generator for EQS and need to put points on navmeshes located on different heights, one above other. So, my idea is to make raycast vertically and find intersection points with navmeshes. ...
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13 views

ACharacter falls instead of landing back at its starting point when jumping at the edge of a ledge

I’m using ACharacter class for a 2D platformer game in Unreal 4.26. When the pawn (the main character) starts to jump from a the very edge of a ledge, it’s not able to land in the same position. ...
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27 views

How to take opacity animation from Blender into Unreal blueprints?

Like the GIF above, I made Skeleton Anim and Material Opacity Anim in the DCC tool. However, FBX file format doesn't support opacity anim, so I have the task of rebuilding opacity anim in the UE. To ...
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39 views

Can You Create a Map that is 1:1 Scale with the United States in UE4 & UE5 [duplicate]

Is it theoretically possible to create a Fortnite graphic quality map in UE4 or UE5 that is 1:1 scale with the United States and be able to have 330 million people all online in that map at once ...
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51 views

Unreal Engine 4.26: How to serialize and load the array of custom UObjects (TArray<UObject*>) in C++?

I have a UProperty in struct which is a TArray<UCoverInfo*> where UCoverInfo is inherited from UObject: ...
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Rendering 3D items in a GUI in Unreal Engine

I have various buildable 3D items in my game like so: These are just a few, but there will eventually be hundreds of them. The models of each of these items are displayed to the user as part of a ...
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1answer
30 views

Give an opaque color to inner base of otherwise transparent cube?

This is my first time using a material in Unreal Engine. I am trying to create a transparent cube except for the inner face of the base, which I would like to be opaque white, like in this drawing: I ...
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Tweak brightness of widget in UE4

I would like to make an interactable monitor in Unreal Engine 4.26. I am using the default material for widgets as you can see in the image below: The texture I would like to show is: When I drive ...
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1answer
24 views

How to change uwidget alignment on/after construction?

Have no idea how to align/realign uwidgets via c++. I have a following widget structure: UButton->UOverlay->UImage. Have to make UOverlay to HFill and VFill the UButton
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1answer
17 views

UWidget::SynchronizeProperties() is not being called on in editor property change

I have to change the children list every time the enum variable property is changed from widget editor. None of the functions I've tried so far seem to have worked (virtual void OnEndEditByDesigner(); ...
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19 views

Audio class values don't load on event begin play

I'm trying to have it so all of the audio values (that are stored in an array in a savegame) load on event begin play in my first-person character blueprint but it doesn't load. It already works as ...
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13 views

How can I set the Actor Label when a new Actor is created?

I'm creating a new type inheriting from AActor in c++. (Unreal 4.26) In the PostActorCreated() function I call ...
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34 views

Unreal Engine - Looping Procedural Mesh Terrain

We are building a procedural voxel terrain based game and have been doing really well. However we have hit a challenge that we have half the solution for. We need to figure out how to loop the terrain ...
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42 views

Nav Mesh Bounds Volume on Z axis

I've just started to learn Unreal Engine 4.26.2 developing an Arkanoid clone. But, I have a problem with the monsters: I don't know if I can use the Nav Mesh Bounds Volume with them, because they fly (...
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25 views

3D projection, Similar to SceneCapture2D

I would appreciate some help, I was wondering if it was possible in UE4 to do a "3D projection" of a scene, Similar to what SceneCapture2D does, but the viewer can see a 3D scene (with a ...
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34 views

MMORPG UE4 Tooling

I'm building an mmorpg using UE4 on the client side with a custom server solution. My target is to build server only data in UE4 editor. Define spawn points Define spawn areas etc I've struggled a ...
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2answers
88 views

Trying To Restart My Shooting Arrow With Overlap

I am trying to restart my shooting arrow if the arrow hits the roof but the bool is not changing [and giving a] cast failed [error] this is my shooter character shooting arrow ...
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21 views

How can I bind fields of USTRUCT with text fields in widget UMG?

I have USTRUCT object. Its fields are filled in c++ code from a JSON object and I need to bind its fields with the content of text fields in a widget. So the flow of my program should be like this: ...
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1answer
88 views

Create and configure new Niagara Emitters from C++

I’m trying to create a magic system that lets the player add spells and modifiers to a spell stack and combine them following a set of rules, creating new spells in the process (that maybe can be ...
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1answer
143 views

Cannot access private member declared in class

I have a class definition as such: ...
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2answers
574 views

Low FPS in Unreal engine, but GPU usage is low as well

I am running an Unreal Engine 4 project which has many high quality assets. My computer is fairly strong: CPU: AMD Ryzen 5 3600 6-Core GPU: GeForce RTX 3060 SSD: Lexar 500GB NM610 M.2 NVMe SSD RAM: 2 ...
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41 views

UE4 Best way to store the winner of a multiplayer game?

Ok I have a Game Mode, and a Game State, the game mode counts player kills and when a player reaches 10, the game mode enters the end state. It stores the winner on the game state, which the clients ...
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62 views

How to create a modular environment that doesn't repeat itself?

I am creating a modular environment for a game so I have walls repeating quite often. What I want to achieve is to have the same walls with a different look, even though they are the same mesh sharing ...
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1answer
242 views

Save current pose snapshot of a skeletal mesh as a new animation sequence asset from blueprint

What I'm trying to do is create a Blueprint Utility tool that lets me create an Animation Sequence asset to save the current Pose Snapshot of a skeletal mesh. I see there's Create Asset node from ...
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31 views

Can I call event from itself

I need to change Game Phases during Game Round. The problem is phases haven't same time duration. So as far as I see, there could be timers by event, but I can't change time interval for them. As ...
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1answer
31 views

Unreal Engine - Materials Import as Gray

I imported the .fbx files from here: https://www.cgtrader.com/3d-models/industrial/other/big-warehouse-pack into an Unreal Engine 4.27 project. All the meshes load in properly, but the materials are ...
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2answers
67 views

Getting cameras from World (Unreal Engine) to set up a static camera only game

I'm afraid I have another Unreal related question. I'm trying to use ACharacter for my characters but the game uses ONLY static cameras (ie. they shouldn't even ...
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1answer
30 views
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62 views

Unreal How to Feed Images into Open CV Lens Distortion Calibrator

I'm currently trying to use the OpenCV Lens Distortion plugin that comes installed by default with the Virtual Production example in Unreal 4.27 to try and create a camera undistortion texture for my ...
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16 views

Add some randomness to the velocity when a ball bounces using UProjectiile Movement Component

I've just started to learn Unreal Engine 4.26.2 with C++. I’m developing a clone of Arkanoid and I’m using UProjectile Movement Component to move the ball. When the ball hit something it always ...
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1answer
107 views

how to download owned assets from unreal engine marketplace on linux?

From any browser, after you own an asset, clicking on download does nothing. To me, as many suggest, installing windows is not ok, but that is just my opinion. Is there any alternative that could let ...
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1answer
16 views

How to access a Material Editor node from a script?

Is it possible to access a node from the Material Editor from a C++ script? I'd like to be able to change the value of 'Mulitply' from a script.
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1answer
54 views

Texture "Mapping" (Using just part of a texture sheet on a object face)? Unreal Engine

I've created a Playing_Card class which is of course for card games such as Blackjack. The class works fine, except until now I have not used graphics. I have now ...
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19 views

How to properly assigned PlayerState variable from Game Mode?

I am currently trying to assign Player Index to my PlayerStates and I have made it through GameMode like below from PostLogin. This is the relevant part: My problem right now is the server actually ...
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1answer
53 views

Ue5 AI MoveTo does not work

I have been having problems working with AI MoveTo and created a very basic version in the hopes of finding the problem: As you may see, I have one single character with the default skeletal mesh and ...
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1answer
60 views

UVs Distored When Importing Mesh?

The first image shown below is of part of my mesh in Blender, and the second is of that same part of the mesh in UE4. For whatever reason, the UVs are distorted and glitchy once imported into UE4. I'...
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17 views

Make character fall straight down on a collision

I'm building a game where I need my character to fall straight down when an overlap (collision) event occurs while jumping. Depending on the angle my character gets deflected, I want it to fall ...
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103 views

Unreal 4 - Static mesh has strange, glitchy shadows?

The first image below shows my mesh in Blender with the Blender lighting, and the second image from inside UE4 has this weird shading on it. Is there any way to help it look like the first image? I've ...
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9 views

Unreal 4 source control not sharing some things with team members

I am working on an unreal blueprint project with another programmer and we are using a gitlab remote repo to store our work. Previously we have been able to push and share our work and see each others ...
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1answer
28 views

Game Mode: call StartPlay when second map is loaded

I've just started to learn Unreal Engine 4.26.2 and C++. I have two maps: one used only to show the main menu, and another one to play the game (Pong clone). On my GameMode, which inherits from Game ...
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0answers
42 views

Why instantiated Static Mesh gets scaled in Unreal Engine 4? [closed]

Building a project in Unreal Engine 4.26 while trying to increase performance of the videogame I ended up using instances of static meshes where possible. This generated an issue: My instantiated ...
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0answers
14 views

Is it possible to automate the export of videos from Unreal Engine so that assets are swapped out dynamically?

Let's say I have an unreal project that features a character in an environment. I want to use Unreal to cycle through characters and environments and create a number of videos. Let's say for instance ...
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32 views

UE4 - Make AI move up and down?

I have this AI character that flys around on the x and y axis in random directions, but is it possible to make the character move up and down randomly? I tried movement input with a lerp and delay but ...
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156 views

Underwater Post Process Using Unreal Engine 4 Water Plugin?

I'm using a custom water body from Unreal Engine 4's water plugin and I'd really like the screen to turn blue as soon as the first person camera goes underwater. I tried putting just a normal post ...

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