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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13 views

Overriden Event does not execute on Unreal

I've been learning Unreal Engine through this tutorial and I am having an issue with overriding an event I created on C++ using blueprints. So here is what I've done: I created a class called ...
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1answer
42 views

Assigning values on multiple clients in UE4

I am currently working on a multiplayer game and I am having difficulties on assigning values on variables for each clients. Originally I looped through available clients character from HUD then ...
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1answer
18 views

UE4 - custom template can only start with blueprints

I tried making a custom template for UE4 to help save some time during gamejams. I follow this tutorial: https://docs.unrealengine.com/en-US/Engine/Basics/Projects/CreatingTemplates/index.html It ...
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25 views

Unable to Package game to Windows 64 in Unreal

I'm trying to package my game but I always get the same problem. ...
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1answer
50 views

How to get Unreal find headers needed for my code to work?

I am trying to open a dialog to select files under UE4, using OpenFileDialog. I added this to my build.cs ...
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1answer
59 views

How to set C++ language standard for VS2019 in an Unreal project?

I am trying to a simple thing, just like that, in a header file; #include <filesystem> #include <iostream> namespace fs = std::filesystem; And ...
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1answer
41 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
10 views

change widget's size through blueprints

I want to change the size X of my 'Horizontal Box' widget's through blueprints but cannot figure out how to do that... the properties that I want to be able to control from blueprints are marked red ...
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1answer
24 views

UE4 bone sockets imported from blender have buggy local transform

I'm exporting this armature with two sockets for left and right hands. As you can see on the Transforms location and rotation are all 0s. Here's my export settings on blender: Now I import it into ...
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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 ...
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1answer
52 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 ...
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1answer
31 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 "...
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Blender to UE4 eye mesh is getting detached

I've created a rigged and animated mesh using MakeHuman and Blender and exported it as FBX file to be used in Unreal Engine, all seems to be working well except the eyes. I've tried parenting the eye ...
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52 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 ...
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33 views

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 ...
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0answers
30 views

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 ...
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1answer
118 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 ...
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42 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, ...
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8 views

The blueprint is not showing up

I created a blueprint called Background which is an actor. I dragged it to the main window but it isn't showing up ... I am just seeing a transparent thing. Can you help please ?
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1answer
25 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, ...
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1answer
20 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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2answers
132 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 ...
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0answers
34 views

Creating runtime mesh colliders for roads in Unreal Engine 4

I want to create several mesh colliders in game at runtime. By mesh colliders I mean "complex collision". The meshes are for curved roads. The roads will be rendered using hierarchichal instanced ...
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1answer
26 views

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 ...
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0answers
28 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 ...
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1answer
27 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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1answer
52 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 ...
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15 views

How to make a dynamic/variable length physics based rope in Unreal?

So I have followed several tutorials on making a physics based rope using bones and physics constraints. Similar to this video here. I have found success but, it seems like a waste of time to keep ...
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1answer
27 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 ...
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0answers
10 views

Unreal: How to properly use a AimOffsetBlend1D

I am new to Unreal and want to make my character do point with the finger pistol where I look at. So I created 3 "pose" animation sequences which are just one frame long. One for looking down, one ...
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1answer
18 views

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 ...
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13 views

All object In unreal Engine 4 Seen Green(Lit Mode)

IN UE4 all objects having green light effect object cannot see properly... Including character in viewport seems greenish... In Lit mode
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0answers
23 views

What's the easiest way to animate a (non-player) mesh?

I made a coffin with some animations in Maya, exported it to Unreal, and I want to start the animation from a blueprint, but I can't for the life of me figure out how. I tried: Play Animation Get ...
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24 views

Unreal AI with behaviour tree not moving

I am making a very simple blueprint. I am making an AI that goes to the player character position. For this, I had made: A Enemy Blueprint, so it would serve as a general enemy management. A Enemy ...
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2answers
75 views

Unreal Engine 4 - AI MoveTo always fails

I try to move a character with AI MoveTo, but it always fails. I tried to do this with standart ThirdPersonController and a custom one. The blueprint is simple When the event happens, it starts ...
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1answer
67 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 ...
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1answer
21 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 (...
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2answers
42 views

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 ...
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1answer
29 views

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 ...
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0answers
25 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, ...
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0answers
18 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, ...
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1answer
48 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 ...
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0answers
20 views

UE4 double linked list and queue does not work with UPROPERTY() macro

Could somebody explain why Unreal's TDoubleLinkedList and TQueue (and maybe some other containers, I'm not sure) does not want to compile with UPROPERTY() macro? Without macro all is OK. However, the ...
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0answers
17 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....
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0answers
10 views

Automatic assignment of materials when importing FBX from Blender to Unreal

I have a model in Blender and have assigned placeholder materials to its faces. I can export it from Blender to FBX and import that to Unreal Editor fine. After I import the mesh I can assign Unreal ...
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0answers
10 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 ...
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0answers
19 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 ...
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1answer
44 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 <...
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10 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 ...
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0answers
21 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 ...

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