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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22
votes
1answer
11k views

How to install Unreal Engine 4?

As soon as I found out that Unreal Engine 4 is now free, I decided to get it in order to tinker with it. So I clicked on the blue "Get Unreal" button, signed up, and downloaded (and installed) the ...
18
votes
1answer
4k views

Is it possible to use the Unreal Engine as a big C++ library, without using the editor?

I want to write a game entirely in C++, but I would like to profit from the possibilities offered by the Unreal Engine, especially in terms of graphics and physics. Nevertheless, I strongly dislike ...
17
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1answer
4k views

In Unreal, what are the differences between C++'s float and FFloat32?

I have been trying to learn some deeper aspects of UE4 and while reading many examples codes and also the source base of the engine, I noticed that sometimes people (and the very source code) use the ...
15
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2answers
10k views

Do industry professionals building games using UE4 use Blueprints at all, or do they use C++ exclusively?

As a teacher on a game development module I have usually insisted that users use C++, because it is a more sought-after skill in industry, but online support and information on C++ in Unreal Engine 4 ...
10
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2answers
4k views

When to use C++ and when to use blueprints?

I'm trying to learn how to use the Unreal Engine. I have basic knowledge of C++. Recently I started making a Survival Horror Game as a project that I'm just doing for the learning experience. So far ...
7
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1answer
3k views

Do I still owe Epic royalties if I am not enrolled in the Unreal Engine subscription?

I have just started using Unreal Engine 4 and I have had a very good experience, though I have left the subscription now. I've made an Android game with it and I am planning to release it, but I have ...
7
votes
1answer
11k views

Unreal Engine 4 is now only free or open source as well?

Recently Unreal Engine 4 become free with Royalty fees. What about the code? Is it opensource or no?
6
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2answers
5k views

Is there an equivalent of Unity's OnCollisionEnter() in UE4?

I've been looking for how to figure out when two objects are colliding all day. If anyone knows how to do it I would be grateful. What I really want is a similar function to Unity's OnCollisionEnter(...
6
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4answers
7k views

Do we really need quaternions? In UE4 I rotate without them

I want to experience gimbal lock to be able to understand how it happens. In lots of videos it shows that when you rotate along one axis, other axis is also being rotated and you obtain gimbal lock. ...
6
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1answer
1k views

What type of networking archtitecture does Unreal Engine 4 have?

I am working on online multiplayer FPS on UE 4 with up to 16 players. I am now at the making architecture model, stage. I am doing research on possible server architecture model with respect for ...
6
votes
1answer
523 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 ...
5
votes
1answer
15k views

How can I get a reference to a object in the world in UE4?

I'm coding a simple maze game in UE4 and I have everything I wanted to implement done except having an obstacle in the scene. What I have is a simple Obstacle class ...
5
votes
2answers
8k views

How can I implement (almost) infinitely large maps in Unreal Engine 4?

I'm making a game where a helicopter travels around. I'd like that the environment around be as realistic as possible. For instance, since the helicopter can travel at speeds up to 200 km/h, I want ...
5
votes
2answers
1k views

Can I use fonts under C:\Windows\Fonts for text in my game?

I'm using Unreal Engine and their UMG system which comes with only one font by default ("Roboto"). The engine allows importing new fonts so I'm wondering whether I can use the fonts already available ...
5
votes
4answers
7k views

Why do I get a blank material in Unreal Engine 4?

When I'm adding a material to a box in UE4, the material loses its textures. I want to add this material To this After I'm trying to drag & drop the material into the scene above (like in UDK) ...
5
votes
1answer
6k views

How can I make the player spawn at a specific location on the map?

I'm trying to make a game in Unreal Engine 4.8, I've got a Player Start actor in the main level and a box collision that loads a new level, but when you return to the main level you obviously spawn ...
5
votes
2answers
2k views

In a large space simulation, why is my sun light not reaching the planets?

I want to create a space simulation, but I'm facing some difficulties when I try to create a realistic sun. Currently, I've a simple Point Light inside a sphere. But for some reasons, no matter the ...
5
votes
1answer
406 views

What does the update button in the Unreal Engine launcher actually update the engine to?

Unreal Engine 4 seems to have a very handy way of managing different versions of the engine - mainly you get to keep several copies and choose which one to launch. That said, not having used the new ...
5
votes
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 ...
5
votes
0answers
634 views

How to get UE4 to correctly put my bundle identifier for iOS projects?

Each time I create a new project UE4 adds a generic bundle identifier to the iOS platform settings, that I always have to change to com.myname.[PROJECT_NAME] in ...
4
votes
1answer
339 views

What Situations is Saving a Game to Main Memory for?

I've been reading through Unreal's 'Saving and Loading' guide: Link Within, they present a capability to save a game to main memory rather than secondary storage: I haven't found any information on ...
4
votes
1answer
285 views

Optimization for Normal maps with lots of wasted space?

I'm working on level/character assets where I'm finding that I use only very little amounts of normal mapping on them, resulting in 2048x2048 textures that are mostly blue/purple. Is there any method ...
4
votes
1answer
3k views

Why does UE crash when I spawn a tile actor like this?

I'm trying to replicate a version of "Paper.io" using Unreal Engine and C++ as an exercise. My idea is to have an instance of an Actor (that is my "Grid class" in this case), and another Actor acting ...
4
votes
1answer
220 views

Why does the engine crash when I POST data to a server?

I am working on communications between my game and a cloud database. I'm working on the authentication part but when I try to pass data to the server in a POST the engine crashes. If I pass in a ...
4
votes
1answer
8k views

How would you implement a simple strategy player controller in Unreal Engine 4?

All player controllers in the C++ game templates are not for strategy games. They all implemented so the player controls just one character. I'm not sure what approach to take when you want to control ...
4
votes
2answers
6k views

Why do I get “UObject” has no member “BeginPlay” errors?

I loaded up UE4 to work on a new project. I created two C++ classes, one for a bullet, one for a cannon. Upon loading into Visual Studio 2015 I immediately get the error: "UObject" has no member "...
4
votes
1answer
1k views

Rotate a rigid body not around its centre of mass

I have a rigid body (a boat) whose centre of mass is towards the front of the object. However, this makes the rotation look strange as the rudder that is turning the object is at the back of the boat ...
4
votes
1answer
870 views

Importing materials from blender to UE4

So my problem is that I have a nice green glass material in blender which I imported to UE4 (4.8.1) but in the editor the material was just a simple green colour. I have no idea what I should do to ...
4
votes
1answer
777 views

Frame independent buoyancy using Substepping

I am having trouble with a frame independent buoyancy force using substepping in Unreal Engine 4. The original problem (which I am attempting to solve using substepping) is that when you apply a ...
4
votes
1answer
8k views

In UE4, how do I turn my character's body together with the camera?

I made a simple punch animation in Blender and exported it into Unreal Engine 4. In-game, the character appeared from a 3rd-person perspective, but I made it look like first-person by adjusting the ...
4
votes
1answer
2k views

How can I enable flat surface reflections in UE4 on mobile?

Could someone please tell me how do I enable reflections on flat surfaces on a mobile in UE4? I have a simple room with one directional light. I need reflections on the tables and ground planes. I ...
3
votes
4answers
210 views

At what point of Game Dev pipeline it is good idea to start adding Oculus Rift Support? [closed]

I am still in pre-dev phase - creating Assets, editing storyline, doing OOP analysis. I plan to make game in UE 4 and would like for game to have VR support. Would it be good idea to start right away ...
3
votes
3answers
5k 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 ...
3
votes
1answer
285 views

Merging custom c++ engine with Unreal Engine

I have my own custom C++ game engine with networking, game logic (most important) suitable for type of games I am working with etc. I find it harder and harder to keep up with other engines in case ...
3
votes
3answers
444 views

Drawing roads on heightmaps

I've been running into walls for the past week or so on my toy project in UE4. My goal is to draw procedural roads on a procedural landscape (eventually getting to intersections and buildings). The ...
3
votes
1answer
2k views

How can I stop the Unreal Editor's UI from being blurry?

My Unreal Engine UI does not look sharp and is blurred on my 1080p monitor. Subsequently, the viewport is slightly blurry and edges are jagged. I have changed the setting of the viewport to "...
3
votes
1answer
370 views

UE4 How to Avoid Boundary Seams with Multiple Refractive Meshes

We use multiple box meshes to create our game world in Unreal Engine 4, but we also use those boxes with translucent/sss materials with refraction. The problem is there are seams between those boxes ...
3
votes
1answer
3k views

How to export unreal assets in a package like in unity?

Unity has an asset exporter that export it into a .unitypackage format. This ensure that the prefab has all the links to its child assets. In Unreal 4, its migrate tool allow for moving of assets. ...
3
votes
1answer
12k views

How do you spawn a component from a class in UE4?

Background I'm working on a shooter game at the moment and I'm trying to spawn an Actor Component for the weapon currently in use, in order to have less ...
3
votes
1answer
266 views

How can I spread my texture evenly across a cylinder in Unreal Engine 4?

How can I spread my texture evenly across a cylinder in Unreal Engine 4? Specifically, in the image below, I would like have texture on cylinder (on the left) match the one on the box (on the right). ...
3
votes
1answer
316 views

Create a instance of a C++ class within a blueprint

I'd like to create an instance of a C++ class in a blueprint. That's my current approach, but the instance is None. Why?
3
votes
1answer
820 views

Randomizing material across meshes - UE4

I have multiple instances of the same mesh which is using the same material. While looking for randomizing textures, I came across texture bombing and so the material in 1 wall looks fairly random. ...
3
votes
2answers
3k views

Unreal engine how do I change the visual studio version without having loaded up a project?

I get an error which I mentioned in a previous post. I did a little more research on this error and found out that I need to use an up-to-date visual studio. I think that I might need to change the ...
3
votes
1answer
4k views

Why are there no dynamic shadows in UE4?

So my problem is that other than for static objects which have baked shadows from building lighting, there are no shadows for movable objects, like those cubes. Neither from the Light source actor, ...
3
votes
1answer
502 views

Bringing over OpenGL code to unreal engine?

So I've been developing games and apps in C++/OpenGL for a while, and am thinking of starting to use Unreal Engine for many things. I've built up quite the huge libarry for UI / rendering related ...
3
votes
1answer
4k views

How to get the 3D location of a click in unreal engine 4?

I'm trying to do a board game in unreal engine 4. I've set up pawns and a board actors. However, I would like to be able to decide on which case of the board the player clicked. The board is one ...
3
votes
0answers
132 views

How can I make a tendril flame like aura visual effect?

I am a bit new to UE4 and I'm trying to get a tendril flame like aura like the picture below. Does anyone know how I would go about this? Should I use post processing or particles?
3
votes
1answer
2k 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 ...
3
votes
2answers
2k views

How to display Render Target live to HUD widget in UE4

I'm making a security camera system in Unreal Engine 4. It allows the player to 'activate' the monitor, which should display the Render Target texture or the material made from it on the HUD. However, ...
3
votes
0answers
70 views

Many-to-one and feedback loop connections allowed in UE4 blueprints

Under what circumstances is it allowed to connect: Multiple execution output ports (those with the blank triangle) in different branches to one single execution input, effectively merging the ...

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