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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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Blueprint script executed on tick but not on construction

Below, on event tick, I am initializing a map of images once, which works fine (remember we are in a graph for a widget blueprint here). Z Cursor Images is the map of the images. The keys in the map ...
Serhii's user avatar
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1 answer
218 views

Need Help Figuring Out Damage Calculations for Diablo RPG Clone

I'm building a Diablo clone using Unreal Engine 4 and have been having trouble wrapping my head around how the combat calculations should work. I copied a lot of the core stats from the original ...
CrashTestDummy's user avatar
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1 answer
716 views

Problems setting up and adding classes and compiling in UnrealEngine

I just installed UDK and Tried compiling a project in C++ at first it didn't compile I searched for it and it only said like "try again till it works" and I did then it worked "...
xtcPanda's user avatar
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2k views

References are missing after migrating Unreal assets

I'm currently trying to migrate some VFX assets (meshes, materials, textures, material instances, niagara emitters and niagara systems) to another project on another machine. My folder structure looks ...
iQew's user avatar
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Using behavior tree with custom pawn and movement component

I am trying to have a custom APawn along with its custom UPawnMovementComponent and AIController, to move to a location using the MoveTo node of a behavior tree. I've followed the code in the engine ...
Stud's user avatar
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How can I realistically simulate audio for multi-sensor processing?

I am performing audio simulations in Unreal Engine 4. Ideally, I need realistic audio propagations. So microphones at multiple locations will experience propagation delays related to their distance ...
DarkLink's user avatar
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1 answer
3k views

Cannot create a C++ Class on UE4

I'm new to UE4 (4.24 on Ubuntu 16.04) and I'm using AirSim and the Blocks world. Whenever I create a C++ class, I get the following message: "Successfully added class 'MyActor', however you must ...
nmpm's user avatar
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773 views

Unreal editor warns that Xcode is not installed on MacOS 10.14

I'm running MacOS 10.14.6. When I launch Unreal v4.25.0, I get the following warning: Xcode was not detected on this Mac. Metal shader compilation will fall back to runtime compiled text shaders, ...
tomh's user avatar
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303 views

Creating a Pawn that simulates physics

I'm trying to make a Pawn that I can raycast against. Starting from the DefaultPawn object, I can't find a way to have a StaticMesh cube that simulates physics. My raycasting code works with Actors, ...
Stud's user avatar
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1 answer
366 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 ...
LimBae's user avatar
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2 answers
452 views

Why is my texture spilling?

I'm trying to create a 3D Sword Slash VFX and created the model for the effect in blender. It's basically a wedge or ufo-shaped mesh. I proceeded to paint a simple test texture to see how it would ...
iQew's user avatar
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Is there a way to setup a notification from Unreal Engine when it finishes packaging / building my game?

In Unity I was able to use a post build script to send myself an email when Unity finishes building a game. Is there a way to make a script run when Unreal Engine is done packaging a game? Or any ...
Jorge Luque's user avatar
1 vote
0 answers
237 views

Multiplayer game server headerless (Unreal/Unity) vs Custom Maps

I've been pondering about different approaches that a multiplayer game server can be managed and programmed. For instance some of the big engines like UE4 & Unity provide a 'build' flag that can ...
Andrei's user avatar
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1 answer
453 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 ...
Louis Child's user avatar
2 votes
1 answer
1k views

In Unreal why is it safe to access a UTexture2D's properties from the render thread despite the documentation stating this is not allowed?

I've been trying to implement something that will update textures on the render thread from a background thread. And from what I've read of the unreal engine documentation you should never access a ...
J. Rehbein's user avatar
1 vote
1 answer
5k views

How to run 'Call in Editor' Functions that are implemented in Level Blueprints?

I have a Blueprint Function within a Level Blueprint, marked as Call In Editor. How can I ...
Natalo77's user avatar
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How to collect objects from map in blueprints

I have a plate with trigger(TriggerVolume) on it. When it overlapped cubes from map deleting. I've manually created references on cubes in blueprint to delete them but it seems very hard-coded. Is ...
Eugene Roasted's user avatar
2 votes
8 answers
14k views

AI MoveTo always fails

I try to move a character with AI MoveTo, but it always fails. I tried to do this with a standard ThirdPersonController and a custom one. The blueprint is simple When the event happens, it starts ...
stdnik's user avatar
  • 31
2 votes
1 answer
8k views

How can I expose material parameters in the Unreal level editor?

Is there a way to expose material parameters in Unreal 4 so that they are accessible from the level editor? As far as I know, I can only do this through the Material Editor, but I wish to do it more ...
01F0's user avatar
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1 vote
1 answer
3k views

Mesh turns black after baking light

I had to port a project from Unity to Unreal which relied mostly on baked lighting. When I baked the light (StaticMeshActor set to Static), the 3D model in the map turned black. Without bake (...
01F0's user avatar
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2 answers
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How to find the client's monitor valid refresh rates with Unreal Blueprints?

I am making a settings menu. This includes a combo box where you can change the refresh rate setting. How do I find out the maximum allowable refresh rate of the ...
Natalo77's user avatar
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Why can't this event call its parent event?

It's me... Back again... with another Unreal problem... I have an Event in my Parent Class called ...
Natalo77's user avatar
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0 answers
57 views

UE4 tips how to handle Minigolf Multiplayer

Heyo! I'm doing a Minigolf multi-player game right now. What I couldn't figure out by now is how to set up the game logic of the actual game. So where to keep track of all players being in bounds, ...
Pascal Schaible's user avatar
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34 views

Why can't CreateEvent be used as a value in a blueprint Map?

I need to map Button to Event, seeing as Unreal does not allow me to call premade events (in this situation, ...
Natalo77's user avatar
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1 answer
973 views

How to apply saturn's ring texture in Unreal Engine 4?

I'm working on a "solar system" model project. And while trying to apply saturn's ring texture which is this one : it ended up looking like this: I'm new to UE4 and this branch in general. So I ...
uzad.adblm's user avatar
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394 views

What is the equivalent node in UE4 for Blender's Musgrave Node?

I'm trying to recreate Poliigon's non-tiling nodes https://www.youtube.com/watch?v=-VgtSL5ZpYc, in UE4, and the only thing so far I don't see the equivalent to is the Musgrave node https://docs....
jeff spinner's user avatar
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0 answers
190 views

High quality specular reflections on Android

I opened the Unreal Editor VR example, imported the TwinMotion materials and set the floor to a nice parquet. In the editor it looks like this: However when I run it on my Oculus Quest it looks like ...
Timmmm's user avatar
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1 vote
0 answers
61 views

What is the better form of movement for a vehicle that the player is inside of?

I am using unreal engine 4 to make this. Basically I have a submarine that the player can move around in and can control the submarines movement within an ocean. However I don't know the best way to ...
Alex's user avatar
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1 answer
2k views

Why can't UObject derived objects call BlueprintFunctionLibrary functions?

My question is a very simple one. Why can't UObject derived classes (direct inheritance) call functions from Blueprint Function Libraries? __ Edit: My question relates to Blueprints only. An <...
Natalo77's user avatar
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20 views

Unreal - Where should I put my 'Save System Controller'

Making a save game system for a single player platformer game in Unreal. Needs to be accessible from the Main Menu Cannot be a component on the player. Where is the best place to put/store this ...
Natalo77's user avatar
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29 views

Creating an asset library accessible from all classes

The idea of what I'm trying to do is to create a class that will automatically pull in all of the assets needed using the ConstructorHelpers and store them in a library with IDs. Then from there, any ...
Maxim Srour's user avatar
1 vote
1 answer
102 views

Unreal Engine Linux Support

I use multiple game Engines, but havn't used Unreal engine for quite a while, Now with the recent changes in Unreal Engine there are quite some interesting features which would be interesting to use ...
TeD van Loon's user avatar
3 votes
1 answer
4k views

In unreal engine, what's the difference among "set global time dilation" and "set current time dilation" and "set custom time dilation"?

what's the different effect of these three functions, thanks!
TwenteMaster's user avatar
0 votes
1 answer
805 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 ...
Amazing User's user avatar
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2 answers
3k views

How to apply a texture to an object by face rather than the entire object? (unreal 4)

I am trying to apply different textures to a model I have by face rather than the entire object. I am only able to add one material to the entire object. How can I apply different textures to ...
A D's user avatar
  • 3
1 vote
1 answer
442 views

Exporting models from Crocotile3D to Unreal Engine 4 (.obj). Texures are always blurry. I want crisp, clean textures

Can anyone help me? I am exporting models with textures (.obj) from Crocotile3D to Unreal Engine 4. I want them to be crisp and clear, as in the left image (Crocotile editor), but only get blurry, as ...
Sam Luxton's user avatar
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0 answers
745 views

GetUserWidgetObject returns null

I have a widget component inside of my character: ...
modernator's user avatar
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0 votes
1 answer
261 views

How to prevent rendered wound from sliding on moving character?

I am trying to display a rendered wound on the character, but I still can't figure out how to display it properly without sliding on character's body. I'm following this link on rendering the wounds ...
Mira's user avatar
  • 139
1 vote
1 answer
778 views

What does 'AlwaysResetOnEntry' do, and where would it be used?

In Unreal Animation Blueprints, each state has an option for AlwaysResetOnEntry. The tooltip text for this is: ...
Natalo77's user avatar
  • 699
0 votes
1 answer
354 views

Avoiding Incredibuild error when building

Apparently the UE4 Installed Build script function is trying to use Incredibuild, but halting with an error. I believe this is due to my Agent Services not running, due to the fact that I have none. ...
Jillinger's user avatar
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0 answers
654 views

How can I import a model from a Source Engine game into Unreal Engine 4?

I am currently developing a game in Unreal Engine 4. This project is for personal use, and will not be exhibited or sold. Because I have no talent, I need to snatch some models from some Source ...
video's user avatar
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0 votes
1 answer
516 views

What is the correct way to make an Installed Build?

I am trying to use the Automation tool, following the documentation. To create an Installed Build: Run the Installed Build Script by invoking the AutomationTool with the following command line, ...
Jillinger's user avatar
0 votes
1 answer
2k 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. ...
Jillinger's user avatar
0 votes
1 answer
68 views

Get FVector from Blueprint tick function

In my BluePrint Tick function for my character, I have a FVector that always changes, and in my C++ component, I want to get this changing FVector and use it in my C++ Tick function, is that possible ...
Johnny Bra's user avatar
0 votes
1 answer
207 views

How do I create cinematic (trailer like) shots of my game?

Background We are in the midst of developing a trailer for our game. It is a 3rd person adventure platformer. As such, the camera is an over the shoulder position, which is great for gameplay, but ...
Natalo77's user avatar
  • 699
0 votes
1 answer
226 views

Get BP FollowCamera Rotation and Location

I'm accessing my FollowCamera https://i.sstatic.net/dXKjt.jpg from my BluePrintCharacter class in my C++ code, with this following line : ...
Johnny Bra's user avatar
1 vote
1 answer
761 views

Update Project Version, or other Project Settings, from command line

Is it possible to update UE4 Project Settings from command line? More specifically I would love to be able to update the following Project Settings attributes from command line using, for instance, <...
Automatico's user avatar
1 vote
1 answer
3k views

Unity raycast equivalent in Unreal

I've been moving from Unity to Unreal and I'm finding it difficult to grasp the Raycast (Trace) logic of Unreal. The use case I'm trying to implement at the moment is to trace a ray and check if I ...
Daniel Marques's user avatar
2 votes
1 answer
2k 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: ...
Anton's user avatar
  • 23
1 vote
2 answers
308 views

Third person and LineTracing C++

Problem I have a crosshair in the middle of the screen. I need to create a lineTrace that passes straight through this crosshair. As this is a third person game,...
Johnny Bra's user avatar

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