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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3 views

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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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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1answer
111 views

Visual Studio not adding the header file to the Solution explorer

I'm having trouble with my Unreal Visual Studio 2019 project. I created a new header file, and saved it in the same folder my other ones are in. (I didn't add these, they were in the starter project ...
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2answers
157 views

How to render thin glass with proper refraction?

I want to render thin bumpy glass with refraction. But it offsets too much(look at the black frame of the glass). Looks thick. How to do thin glass refraction properly? Or is it possible to exclude ...
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22 views

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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1answer
130 views

Why is my mesh outside its collision component grid?

I've created a blueprint (well, two of them, as a test since the first one wasn't working right) with an sphere component around a mesh, as in the picture: As you can see, the mesh is well placed ...
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2answers
208 views

Objects Imported from Blender to Unreal have really zoomed Materials

I've been learning how to use Blender for UE4. I just started figuring out how to define which sides should have materials on them. In particular, I wanted this building to have different materials ...
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1answer
573 views

UE4 Blueprint Multiplayer Spawning Issue

I'm attempting to copy/modify the MultiplayerShootout project's multiplayer functionality for my own project. I'm running into issues when Player 2 joins a running session though. Finding it very hard ...
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1answer
3k views

Creating a real loading screen between levels in Unreal Engine 4

I'm trying to create a loading screen to pop up between levels in Unreal Engine 4. I want to have a traditional loading screen such as the loading screen in Skyrim, where the player presses play and ...
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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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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
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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4answers
7k views

How to create custom gravity in unreal engine and only affect specific actors?

I am fairly new to unreal engine and I would like to know how to set custom gravity in a specific point or area instead of down. For example I do not want the gravity pull to be down but more to the ...
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0answers
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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1answer
55 views

Unreal member variables reset between function calls

I'm trying to make a weapons switching mechanic in my game. My implementation is a data asset that contains an array of weapons with each weapon contatining the meshes, stats and a weapon actor ...
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2answers
55 views

Adding 2 sounds to 1 asset

I've got a sound looping from the start of the game, working exactly as I need it to. What I need is a second sound to alert the player that they have located the hidden object (the first sound is a ...
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1answer
48 views

Why is the Set new visibility doesn't resets the hair's skeletal mesh visibility to be visible?

The helmet is loaded when pressed a defined key and helmet is removed automatically by setting the remove on 2s delay. The Problem when the helmet is removed, the hairs visibility doesn't sets to be ...
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2answers
2k views
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1answer
239 views

Why does iOS packaging fail when I activate Apple ARKit plugins in Unreal Engine?

Steps, Using Unreal Engine 4.21.2 1 - I created new Third Person game from the Unreal Engine template and named it FaceARSample 2 - I imported a skeletal mesh with blend shapes 3 - I added this to ...
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1answer
87 views

Get BP FollowCamera Rotation and Location

I'm accessing my FollowCamera https://imgur.com/a/vbFagxg from my BluePrintCharacter class in my C++ code, with this following line : ...
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1answer
577 views

Destroy multiple actors by pressing a button

I'm making a simple project to learn Unreal Engine. I have 50 actors (blueprints) and at the start a function will loop 5 times and spawn 5 of the 50 actors randomly. How can I destroy the actors by ...
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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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1answer
202 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 ...
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1answer
563 views

How to use PhotonPeer in Unreal Engine 4.8

I'm trying to implement PhotonPeer in Unreal Engine 4.8 but I'm stuck at the connect function. I need to provide an AppId, but nothing I try is accepted by UE4. Here's my code: DALGameInstance.h <...
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1answer
2k views

How to increase vertical Nav Mesh detection for AI Actors? Using Default Query Extent?

For my swimming AI, I wish to use a Nav Mesh, so they may avoid obstacles and swim up and down - preferably. I figured I should try to solve this with a nav mesh, since UE4 has kindly implemented it ...
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0answers
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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0answers
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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2answers
3k views

How can I edit collisions in Unreal Engine?

I made a concave house model. When I import it to Unreal Engine it generates a simple box collision that covers the full mesh. I need a collision that only covers the walls. How can I generate one or ...
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0answers
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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1answer
863 views

UE4. How to create a reference to the physical material asset (which I create in editor) in C++

Oftenly, when we want to assign asset to the particular component in C++ we write code like that: ...
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1answer
85 views

How to get image component from blueprint in c++

I have a dialog screenwith character icon and I need to be able to set up this image in code. But I don't know how to access this Image component (I put material instances in it). .h ...
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1answer
1k views

What folders can be safely deleted after building UE4 from source?

What folders, if any, can be safely deleted, after building UE4 from source? After the build, UE4 files occupy 65 GB of disk space, which is way above comfortable for me, since I only had 72 GB free. ...
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1answer
713 views

Map with media texture not packaging

I have a simple map with a Big-sphere and a pawn inside it. I use media texture and media player to play 360 video on it. But when I try to package it for windows-64 it fails while it tries to cook ...
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1answer
320 views

How can I use tilt sensor in iOS iPad to steering a car

I am absolute beginner with unreal engine , I am working in car race project here is my situation : I need to navigate my car in left and right direction using tilt Here is what I do I read tilt ...
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1answer
564 views

HumanIK Z axis Up in Maya for Unreal Engine

I am pretty stumped! I want to use HumanIK in Maya to throw together some prototype animations for my game that is being developed in Unreal Engine 4.7 The issue is that Unreal requires Z axis to be ...
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0answers
45 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 ...
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1answer
2k views

A script isn't showing in the Content Browser

Just to set the tone, I'm very new to game development. I'm currently taking an online video course for Unreal Engine 4 that required me to create a C++ script. After I created the script and it ...
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1answer
108 views

Multiplayer Replication Unreal Engine 4

I have variable=count(integer) in a Character Blueprint. I want to increment the variable when user presses the 'R' key. What do I so in the Blueprint that ...
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1answer
196 views

UE4 - Cloth collision

How is collision working in UE4 Free Asset Paragon-Kallari? It seems like the body of the character and the cape is somehow colliding but I wasnt able to find any physics asset or any setting. Could ...
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5answers
4k views

How to make TEXT RENDER stand facing the camera of my character and also for the camera of simulation?

I have an actor (Minion) with a Text Render just above it mesh: As you have seen, I defined your rotation as absolute, so the text does not rotate along with the actor. In the game the rotation ...
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1answer
400 views

Can't connect to Steam using Blueprints in UE4.25

I'm following this tutorial by Unreal Engine itself, but I don't have a Steam overlay popup like I'm supposed to, (according to the tutorial.) And actually a lot of people have a similar issues like ...
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1answer
129 views

Why does my game look different on my mobile device than in the editor?

I am new to Unreal Engine. My game in mobile looks totally different than in Unreal Engine editor. In Editor: In Mobile: Is this a symptom of something obvious? How can I make it so that what I'll see ...
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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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1answer
156 views

Using UPawnMovementComponent to control a Pawn with Keyboard sharing code between Pawns

I've just started to learn Unreal and reading the tutorial Components and Collisions I have found that they use the UPawnMovementComponent to control their ...
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1answer
3k views

Deproject Screen To World Coordinates (Unreal Engine 4.15)

I am working on a small game in Unreal Engine 4.15 using blueprints only and encountered a behaviour I don't understand. The game is based on the Top Down Example. As I'd like to teleport an actor ...
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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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0answers
30 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 ...
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1answer
121 views

Is naming convention a good base for a sorting and tagging system for game assets?

TLDR: what are the pros and cons of using a naming convention for tagging and sorting game assets? for the UI to search and handle it for devs and gamers to move files around I am building a game ...
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1answer
563 views

UE4 - Want my landscape to be unlit BUT catch shadows from objects

Here is my problem, I have a landscape that was created through photogrametry. I already has strong shadows on it's diffuse texture so I don't want it to be affected by my virtual sun. What I do want ...

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