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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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What are Unreal Engines Pawn Action's Used for?

Inside of a Behavior Tree you can create a task called Push Pawn Action, and it appears you can select between several types of actions or create your own. What is the purpose of this and how is it ...
Aaron.Bidwell's user avatar
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2 answers
744 views

Why do my axis mappings to remap the MoveForward and MoveRight keys not seem to have any effect in-game on Unreal Editor 4.27.2?

Since I have an azerty keyboard instead of a qwerty one I'm trying to remap wasd to zqsd for the in-game playing in Unreal Editor 4.27.2. I've started a new blank c++ project with starter content. ...
ultraking x2's user avatar
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1 answer
150 views

Find vertical angle between two objects

I'm working on a project that involves a battleship with multiple turrets on it. The turrets have limited movement on both horizontal and vertical axis. When checking if they can target the player I ...
Dave's user avatar
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1 answer
95 views

Replace Volumetric Clouds With Mesh?

I'm looking to replace the Volumetric Cloud shader, or at least edit it in some way, to replace the clouds with a mesh. I'd like the meshes to be duplicated (without duplicating into one another,) and ...
MmmChezBurgerz's user avatar
1 vote
1 answer
1k views

Rendering Unreal Engine 4 sequence: character timeline animations don't show, and behave as if they are in play mode

I have a cinematic sequence with camera cuts set up that can be previewed properly. These scenes involve human skeletal character animations that I made frame by frame in the timeline. Everything ...
practicemakesperfect's user avatar
1 vote
1 answer
798 views

UE4: How to make UProceduralMeshComponent a solid body, not just a surface around volume?

I generated the UProceduralMeshComponent and set collision enabled to ECollisionEnabled::QueryOnly. But I get ActorEndOverlapEvent if I stop touching the mesh border even if I still inside of mesh ...
Robotex's user avatar
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1 answer
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My character runs around on their own after picking up an object

I have a weird bug on my hands. I am trying to create an event whereby the character walks into an object and automatically picks it up once the collision occurs. The character can pick up the object (...
gash_'s user avatar
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How to trigger Onclick event in C++

I made an actor with a boxComponent and binded the Onclick with a function and I also SetGenerateOverlapEvents(true); Then I created a line trace in my pawn, but it ...
ma1169's user avatar
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72 views

Fast way to test whether a point is over a 3D mesh

I have a map with islands, and I need to detect whether the player is on an island or not. The player can be flying far above the island, so a fixed-distance raycast is not sufficient, and firing long ...
Robotex's user avatar
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386 views

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: <...
Simone Lungarella's user avatar
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1 answer
2k 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 ...
Thatdoid's user avatar
1 vote
1 answer
376 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. ...
Robotex's user avatar
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0 answers
160 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 ...
Samuel Miesse's user avatar
1 vote
0 answers
2k 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: ...
Robotex's user avatar
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991 views

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 ...
Drew's user avatar
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1 answer
254 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 ...
interwebjill's user avatar
2 votes
0 answers
884 views

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 ...
Raffaele Lungarella's user avatar
0 votes
2 answers
827 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
SunGrow's user avatar
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1 answer
180 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(); ...
SunGrow's user avatar
1 vote
0 answers
53 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 ...
Nota's user avatar
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2 answers
111 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 ...
Sakur7's user avatar
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0 votes
2 answers
1k 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 ...
D.Varas's user avatar
0 votes
1 answer
2k views

Cannot access private member declared in class

I have a class definition as such: ...
Pumpkin's user avatar
  • 133
0 votes
2 answers
8k 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 ...
Quantum Guy 123's user avatar
1 vote
0 answers
123 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 ...
Raffaele Lungarella's user avatar
1 vote
1 answer
2k 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 ...
Simone Lungarella's user avatar
0 votes
1 answer
429 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 ...
Quantum Guy 123's user avatar
0 votes
2 answers
1k views

Getting cameras from World to set up a static camera only game

I'm trying to use ACharacter for my characters, but the game uses ONLY static cameras (ie. they shouldn't even logically be attached to the mesh of the characters). ...
I_Keep_Trying's user avatar
0 votes
1 answer
348 views

Inheritance in Unreal C++. "GetOwningActor" doesnt return type "AMyPlayer"

...
I_Keep_Trying's user avatar
1 vote
0 answers
324 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 ...
Benjamin Danger Johnson's user avatar
0 votes
1 answer
2k 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 ...
Aquarius Power's user avatar
1 vote
0 answers
2k views

How to properly rotate a Pawn (Player Possessed) in Unreal Engine?

...
I_Keep_Trying's user avatar
0 votes
1 answer
281 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.
I_Keep_Trying's user avatar
0 votes
1 answer
857 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 ...
I_Keep_Trying's user avatar
3 votes
2 answers
2k 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 ...
Pumpkin's user avatar
  • 133
0 votes
1 answer
932 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'...
MmmChezBurgerz's user avatar
1 vote
0 answers
388 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 ...
MmmChezBurgerz's user avatar
1 vote
1 answer
241 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 ...
VansFannel's user avatar
1 vote
0 answers
119 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 ...
Simone Lungarella's user avatar
1 vote
0 answers
22 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 ...
user379468's user avatar
1 vote
0 answers
780 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 ...
MmmChezBurgerz's user avatar
0 votes
0 answers
103 views

How do I create surfing?

I want to know how I can lerp from my current position, to another position, while hugging the terrain. Imagine I'm doing something like surfing, or skateboarding, where I need to follow the rail......
Ryan Glenn's user avatar
0 votes
0 answers
48 views

Multiplayer client has two GameStates

I'm having struggle with GameState. My custom GameState is child of Game State Base. GameMode (child of Game Mode Base) is updating some variables in my GameState. But my clients have two separate ...
hagier's user avatar
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0 votes
0 answers
369 views

How can I recreate a material from blender in Unreal engine

I'm new to unreal and I am having trouble finding a way to reproduce the materials for a mesh in blender in unreal. It's a simple material but I can't find a way to reproduce the color ramp ...
Adriano Rivadeneyra's user avatar
1 vote
1 answer
969 views

How to desaturate and blur the game world when paused in Unreal Engine 4

I am creating the pause menu for my game. I want the screen to turn black and white and blurry when it is paused, much like Left4Dead. But the only special effect I can find is background blur. How ...
Bitslay's user avatar
  • 11
1 vote
1 answer
580 views

How do game engines enforce global, engine-specific coordinate systems?

In Unreal, the 3D coordinate system is defined as a right-handed, X-forward, Y-left, Z-up frame of reference; but, the default 3D coordinate system for, say, DirectX is a left-handed, X-right, Y-up, Z-...
Casey's user avatar
  • 2,045
0 votes
1 answer
631 views

Unreal gives error when line tracing collision

I am currently using Unreal Engine 4.26. I have been following this tutorial to make a parkour game in Unreal. I followed the tutorial exactly, and made a walk/jump/double jump game. However, when I ...
Rowan McAlpin's user avatar
1 vote
2 answers
3k views

How can I change the game executable name to something other than UE4.exe?

I have a game and when I export it it is called Bounced! but in windows task manager the process appears as UE4.exe but with the logo of my game, how can I change this to Bounced.exe?
Roberto's user avatar
  • 11
0 votes
1 answer
3k views

How can I install Unreal engine on a PC with metered connection or completelly offline?

I need to get Unreal Engine 4 as soon as possible on my desktop PC, in order to complete a task. However, the computer is on a metered connection and downloading it there would cost me about 3 pizzas ...
Tomáš Zato's user avatar
1 vote
0 answers
167 views

How do I prevent my umap from being modified at every save?

I'm using UnrealEngine 4. Every time I save my files, my .umap file seems to be modified. I can basically generate an infinite stream of commits by just clicking <...
Lara's user avatar
  • 111

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