what c++ do you need to know to use for unreal engine reddit

If you desire to develop an XR application for your business or your personal project, there'southward no better fourth dimension than now. And if you lot look at the available tools in the market you volition quickly discover out that at that place's only two feasible options for beginners: either Unreal or Unity.

These days, 3D game engines like Unity3D and Unreal Engine allow people with no prior VR development feel to create VR solutions on par with manufacture veterans. Particularly given that you can experiment with both engines for gratis as long as you lot desire.

Market share of games congenital with game engines on Steam. Source: Reddit

Initially these software platforms were congenital to develop 3D video games however since developing for VR (and AR) is sharing lots of similarities with game development, these game engines were adopted by the XR communities.

You don't have to go far for success stories .

However, another claiming presents itself. What engine should you choose? Unity or Unreal? Or something completely different, mayhap?

In that location are several options (CryEngine, ApertusVR, Amazon's Sumerian), yet there are two engines that are dominating the market share the XR development market place: Unity3D and Unreal Engine 4.

You tin't become wrong with either choice. And the best part? Both game engines tin be used free. This way y'all can practise your evolution chops until you reach a commercial success. If yous don't desire to go out it up to a coin toss, this commodity volition assist you sympathize what the strengths and weaknesses are of both of these solutions.

This article too debunks a lot of myths that surround these game engines to help you choose without bias the one that is all-time for your projection. We are looking from the lens of a virtual reality programmer all the same, fifty-fifty game developers will have something out of it.

Let's start with a quick overview of each 1 of them.

Unity Vs Unreal Engine

Unity Overview

Unity3D is a development engine that was first released in 2005. Since then information technology's go the most popular 3D and 2D evolution platform in the world. Hither are just a few stats :

• 60% of AR/VR content and 50% of mobile games are made with Unity3D
• Over 24 billion installs of engine in the final 12 months
• Supports 28 platforms (from iOS and Android to Oculus and Windows Mixed Reality and all in-betwixt)

Due to its high popularity with mobile platforms, there's a persistent myth that Unity3D is only good for mobile-oriented projects.

That is mostly because, in the by, Unity3D themselves heavily targeted the mobile market, especially during the rise of the Apple's AppStore and Google's Play Market place.

In truth, in the terminal few years the engine has advanced and then much that now it'south a multi-faceted development platform that can exist used for any circuitous XR solution.

Myth: Unity is proficient for mobile VR/AR

Truth: Unity is good for both cross platform solutions and complex XR projects alike (e.thou. entire Audi logistics and car configurator training is created inside Unity3D platform). Or check out Excursion Stream's VR Preparation Simulation Case Study of INVISTA.

What about Unreal Engine?

Unreal Game Engine 4 Overview

Epitome source

Unreal Engine has a long history equally a game engine dating dorsum to 1998. Over its lifespan information technology was licensed to a scattering of AAA-studios for titles like Unreal/Unreal Tournament, and Deus Ex. Information technology'due south had several iterations, such every bit Unreal Engine 2 & three.

Things took a U-turn in 2015, when the 4th version of this ubiquitous development engine was made free to the general public.

Note: In that location is a five% royalty fee for Unreal Engine-powered products that make more than than $3,000 per calendar quarter. There is no royalty if you are using the Unreal Engine for architecture, automotive, film, television, broadcast, live events, training and simulation, or other non-games projects

Below are the key stats for Unreal Engine 4:

• More than vii one thousand thousand users from the design and enterprise community
• Over xv supported platforms

These days, indie developers and major studios tin can both utilise Unreal Engine for their various projects, including games, educational activity systems, and business organization solutions.

Due to Unreal Engine's origin, it's a common perception that Unreal Engine four is a dandy tool just when you work on complex multi-million dollars projects, specially video games.

A list of AAA-titles developed with UE4 that are coming out in 2020. Anyone else excited past Final Fantasy Seven remake?

While information technology'south true that some of the popular game titles, such as Fortnite, are built using Unreal Engine 4, the company backside UE4, Epic Games, is actively developing a mobile segment, along with supporting community projects through their Unreal Dev grants program .

There are besides VR-specific games like Batman: Arkham VR past Rocksteady Studios.

Myth: Unreal Engine 4 is merely good for AAA-game titles and has superior gameplay

Truth: Unreal Engine 4 can be used for VR/AR development, 2d games, 3D and mobile development alike. It is true that Unreal is used far more often on PC games while Unity is dominating the mobile game market place.

Over the years, both Unity3D and Unreal Engine addressed their weak points, so picking one of them over the other is not a simple job.

In lodge to exercise that, let'due south talk about the differences for XR development with these platforms through several lenses.

Which Engine Has The Best Infrastructure?

In lodge to properly compare these two engines, you have to understand that the difference lies not merely in technical aspects (although we'll talk about those in the following section likewise), only in the infrastructure that surrounds them likewise.

Of import factors of the infrastructure  consists of avails stores , documentation , and community .

Let's talk about each one of those in detail.

Assets Stores

Every virtual environment has to be populated with virtual objects that correspond a real or imaginary world.

Below is an example of a VR grooming solution that was developed for Callaway Energy Center:

You can create 3D assets from scratch using a 3D modeling software such equally Maya, Blender or 3ds Max, or you tin can buy the avails via the Assets Store.

Both Unity and Unreal Engine have assets markets that allow you to purchase pre-made 3D models, objects, environments and so on.

The current number of assets in the Unreal Engine market place is around 10,000:

The amount of assets in Unity Asset Store is five times that, with almost 31,000+ 3D assets alone:

The divergence between the two asset markets becomes a factor depending on what project y'all're going for.

Unreal Engine avails tend to exist more than oriented towards finished game productions. Many of them were previously used in AAA-games.

That explains their higher visual quality. Among those assets there are castles, sci-fi tech, and monsters.

Image Source: UnrealEngine.com

If you're developing a game with a relevant fantasy or sci-fi setting, and you find that some UE4 assets are perfect for your projection, Unreal Engine four market tin can be a decisive factor.

At the same time, if yous're developing a VR application for business, graphics quality aren't every bit important equally relevance and iterative development. With iterative process graphics can always be improved along with app optimization.

Given that yous have more avails to choose from in the Unity store, it's easier to find more relevant models and quickly prototype your business concern environment without having to hire 3D modelers and create virtual props from scratch:

Beneath is an example of a jet engine 3D model that you can find in Unity Asset'due south shop. It could exist used in VR grooming simulation for jet maintenance:

Image Source: 3D asset that represents military jet engine

In terms of assets, Unity3D'southward store is very avant-garde. However, Unreal Engine is catching up, and Ballsy Games has recently released a Quixel Megascans Pack with 10,000 high-quality cloth scans from Quixel library.

Allow's talk about documentation and training bachelor for these engines.

Documentation & Training

Both Unity3D and Unreal Engine iv take an extensively developed documentation on how to employ the engines and on XR evolution specifically:

• Unity3D XR documentation
• Unreal Engine XR documentation

But the real educational value comes from external training.

Although there are quality preparation courses that teach y'all how to build XR applications for both Unity3D and Unreal Engine, again, the number of these courses is significantly larger for Unity developers.

For example, the Udemy education platform offers around 2,200 courses for Unreal Development, and 5,500 for Unity. Although near of these courses teach you how to develop games, the bones noesis can be used for building other types of applications also.

Equally for the business and enterprise-oriented courses, those tend to utilize Unity3D environment due to its developed infrastructure and lower entry point for new developers.

Yous can learn about the construction behind the XR course and how exactly it teaches you to build finished XR applications by downloading the syllabus for our x-week project-based live XR development grooming.

Allow's talk in detail about the difference betwixt the evolution communities for Unity3D and Unreal Engine.

Programmer'southward Community

Every year developers are pushing the boundaries further of what's possible in  XR.

Both Unity3D and Unreal Engine are doing their best to provide developers with relevant documentation and training materials, but in this field y'all're inevitably left alone to figure it out which option to pick.

Bugs, glitches, crushes, unsolved code mysteries occur every twenty-four hour period. Who is going to help you solve those, particularly when you're on your own?

Other developers.

This is where the role of the community that surrounds game engine becomes paramount, especially in an emerging XR manufacture

Unity3D, as a freely accessible engine, has been around longer than Unreal Engine 4, so, naturally, it has a bigger community of indie developers surrounding it.

For instance, on Unreal Engine's forum at that place are 12,000 topics on C++ programming, and 4,600 threads on VR and AR evolution.

On Unity3D'south forum there are 128,000+ threads on scripting and 6,100+ topics on VR development. What that ways is that if whatsoever problem occurs, in that location'southward a better hazard of finding  someone with the same problem who can help you acquire virtually their solution.

Some other thing about Unreal Engine 4's community is that it is divided between non-programmers who create application by and large with visual scripting organization called Blueprints and developers who know and use C++.

An example of a Blueprint-based characteristic

There are more non-programmers in the Unreal Engine community. You'll come across that the number of Blueprint-based discussions on forum is twice the number of C++ programming discussions.

This division becomes apparent because many C++ developers don't actively use Blueprints in their development process: That'southward considering code-based solutions are unremarkably more resource-optimized and flexible than Blueprint-based ones.

Thus, expert C++ developers might not be able to help not-programmers but because they don't speak the same linguistic communication.

On the opposite, every Unity3D programmer knows C# — its primary evolution language, so that experienced developers tin hands evidence beginner developers the ropes. It's also something we teach in the XR Evolution for Unity course from the offset.

Let's talk about the difference between development process in particular in the side by side section.

The Development Process

Both engines share many similarities when it comes to development of XR applications. However, at that place are major distinctions besides and we'll talk about those in this section.

C# vs  C++ And Blueprints Comparing

Perhaps, the biggest deviation between the two engines is that they utilize different programming languages.

Although at that place are several programming languages you lot can apply with Unity3D, the chief language for the platform is C#.

Unreal Engine 4, on the other hand, allows developers to choose between C++ programming and Blueprint visual scripting organization.

The debates on which linguistic communication, C# or C++, is amend, has been around for ages, and, frankly speaking, are meaningless.

Both languages are perfectly suitable for XR development, and it all comes down to which 1 you're more than comfy with or have more experience with.

However, C# may be a bit easier on beginners, and hither's why.

Kickoff of all, C# code is simpler.

Let'south take a primitive 3D object, such as cube, and get in bladder and rotate at the same fourth dimension:

Here's a code for this from official Unreal Engine documentation :

FloatingActor.h
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "FloatingActor.generated.h"

UCLASS()
class QUICKSTART_API AFloatingActor : public AActor
{
    GENERATED_BODY()

public :
// Sets default values for this thespian's properties
    AFloatingActor();

    UPROPERTY(VisibleAnywhere)
    UStaticMeshComponent* VisualMesh;

protected :
// Called when the game starts or when spawned
virtual void BeginPlay () override;

public :
// Chosen every frame
virtual void Tick ( float DeltaTime) override;

};

FloatingActor.cpp
// Copyright 1998-2019 Ballsy Games, Inc. All Rights Reserved.

#include "FloatingActor.h"

// Sets default values
AFloatingActor::AFloatingActor()
{
// Ready this actor to phone call Tick() every frame.  You lot can plough this off to improve performance if you don't need it.
    PrimaryActorTick.bCanEverTick = truthful ;

    VisualMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT( "Mesh" ));
    VisualMesh->SetupAttachment(RootComponent);

static ConstructorHelpers::FObjectFinder<UStaticMesh> CubeVisualAsset(TEXT( "/Game/StarterContent/Shapes/Shape_Cube.Shape_Cube" ));

if (CubeVisualAsset.Succeeded())
    {
        VisualMesh->SetStaticMesh(CubeVisualAsset.Object);
        VisualMesh->SetRelativeLocation(FVector( 0.0f , 0.0f , 0.0f ));
    }
}

// Called when the game starts or when spawned
void AFloatingActor::BeginPlay()


And hither's the code to reach the same upshot in Unity3D:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class floatingactor : MonoBehaviour
{
// Outset is called before the first frame update
void Beginning ()
    {

    }

// Update is called once per frame
void Update ()
    {
bladder delta = Time.deltaTime;

float vertDelta = Mathf.Sin(Fourth dimension.time + Fourth dimension.deltaTime) - Mathf.Sin(Time.time);
bladder rotDelta = Time.deltaTime * 20.0 f;

        transform.Rotate( 0 , rotDelta, 0 , Space.World);
        transform.position = transform.position + new Vector3( 0 , 0.25 f * vertDelta, 0 );
    }
}

Result:

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Detect that you need to create two split up files in the Unreal Engine example, one for declaration, and i for definition.

Information technology's worth noting that even though a big chunk of the code is created past Unreal Engine automatically, it may seem a picayune complicated if you lot're just starting out in evolution.

At the same fourth dimension, Unreal Engine features a Pattern visual scripting interface system that you lot can utilise to create complex applications besides. It doesn't require you to lawmaking, and the workflow is node-based.

From official Unreal Engine iv documentation

Most every section in the Unreal Engine documentation is backed up by both in C++ and Pattern examples.

It's quite easy to learn Blueprints, peculiarly when you're just getting started. However, to become the virtually out of UE4 it's recommended to learn C++ and combine Blueprint-based solutions with code.

Note: there'due south a custom Unity3D plugin, Playmaker , that allows visual scripting in Unity3D the same way equally Blueprints in UnrealEngine four.

Another possible advantage of C# is that 90% of VR/AR development companies are using C# , which translates to a largely documented lawmaking-base and a larger amount of tested solutions in the evolution customs.

Platform'southward Source Code Access: Unreal Engine Vs Unity3D

Both platforms are self-sufficient — the tools and workflows they offer are more than enough to create XR applications of any type with no modifications to the platforms' source code.

However, there'southward one major divergence between UE4 and Unity3D.

Unreal Engine iv is an open source engine. Unity3D is not.

What that means is you lot can modify UE4 source lawmaking to fit your needs, free of charge. At the same fourth dimension, yous can view Unity3D source lawmaking , but in order to modify it you need to acquire an enterprise license .

While this may be a deal breaker for bigger productions, smaller developer teams should carefully consider whether they should modify platform source code at all, otherwise one quick fix may spawn an avalanche of bugs elsewhere.

If you demand some custom functionality in Unity3D, in about of the cases platform-based scripting and plugins from the asset store should be enough.

Unity3D and Unreal Engine Graphics Comparing

If nosotros were to time travel back to 2012, when Unreal Engine four was first revealed to the general public, the quality of graphics was unprecedented at the time.

While Unity3D was mostly focused on indie and mobile game evolution, Unreal Engine was congenital on the bones of AAA-game productions.

Since so, the prevalent myth was that if you want photorealistic graphics, y'all have to use Unreal Engine 4.

Myth: If y'all demand stunning graphics, utilise Unreal Engine 4

Truth: Both Unreal Engine 4 and Unity3D are capable of creating photograph-realistic scenes and provide tools for creating stunning visuals

Here's a comparison of graphics between these 2 platforms:

That said, Unreal Engine 4 has a few advantages in the graphics department.

All out-of-box Unreal Engine projects, including assets, scenes, and tutorial projects look better.

Interesting fact: Unreal Engine three included a total-featured lens flares editor, whereas Unreal Engine 4 treats lens flares as a strictly post-processing outcome. Unity3D even so has a wide number of options to edit lense furnishings before processing. Alternatively, you lot can create custom flats in UE4 using material nodes.

With Unity3D, you lot may need some tweaking to get the best out of your 3D assets.

Advanced shaders, advanced dynamic lightings, PBR materials - it'due south just less work for you at the start in Unreal Engine 4 than in Unity3D.

All the same, if yous're using Blueprints, complex node workflows may crusade functioning issues.
A large amount of nodes, complicated math, and resource-demanding operational loops may slow things down compared to an optimized C++ code solution.

Below is an example that shows how a circuitous blueprint system dramatically reduces FPS compared to an C++ code. However, the deviation seems to be smoothed out with MultiThread and nativization processes enabled.

A operation comparing betwixt C++ and Pattern solutions

Rendering Comparing: Unreal Engine iv vs Unity 3D

Rendering in Unreal Engine 4

The Unreal Engine is a game engine that has made waves in the video game manufacture as ane of the first to support DirectX Raytracing (DXR), allowing you to utilise only ray tracing on passes that need it and rasterization on those that do non. This ensured that both render quality and rendering speed are met, which is what every developer wants!

Since then, UE four has been making massive strides to improve rendering speed and quality with every adjacent update.

The most contempo water system in Unreal Engine 4.26 is sure to create any body of water yous can think of, from pocket-size ponds to huge oceans.

The latest update to Unreal Engine four also introduced a new cinematic cloud system. With traditional methods based on skydome textures, clouds often appeared flat and low quality when viewed from an aeriform perspective or from below. This is no longer the case with the UE4's volumetric lights organisation equally they are of college quality and hold up in all viewing angles.

https://youtu.be/nU2aCQnWgmo

The new Volumetric Cloud component was designed to support interactions with environment lighting from the Unreal Engine's Heaven Light component and two directing lights representing dominicus and moon.

Unreal Engine iv.26 has also been released with various enhancements to the video rendering queue such equally more than controlled final render output, photographic camera movement vectors, Z-depth, and more. The newly added support for Apple Pro and Avid NxHR codecs also contributes to high-quality media export.

The next iteration of the Unreal Engine will be revealed in late 2021. Unreal Engine 5 will feature a high-cease reflection system, fully dynamic global illumination, and ambisonics rendering.

And if y'all're still doubtful virtually Unity graphic operation, bank check out this cinematic teaser made in Unity.

Rendering in Unity 3D

Unity offers two rendering techniques, or "paths." To start your project on the right foot, the decisions needs to be made early on about which path to use: Forrad Rendering (default) or Deferred Rendering.

Frontward Rendering is an fantabulous option for those who want to piece of work with transparency and custom shading models. If y'all can manage the light counts in your game, Forward Rendering can be a high-speed solution.

(Source)

With Deferred Rendering, nosotros defer the shading and blending of lite information until after a first pass over the screen where positions, normals, and materials for each surface are rendered to a 'geometry buffer' (Yard-buffer) every bit a series of screen-space textures. Deferred Rendering is a powerful technique, merely it requires high-end hardware to provide the all-time operation. Information technology also isn't supported by some mobile devices.

Ok, cool. Only what about photo-realistic rendering?

After years of agile evolution, pushing the limits of realism and creative expression is at present well within attain of Unity'southward Scriptable Render Pipeline. Unity'south latest Universal Render Pipeline (URP) and High Definition Render Pipeline (HDRP) are building more immersive graphics for immersive digital experiences from realistic materials to cinematic lighting effects.

The latest HDRP 10 update includes improve tools to help you debug lighting, whereas the new depth of field mode will produce beautiful, high-quality images with path-traced defocus mistiness.

URP provides artist-friendly workflows for creating optimized graphics across a range of platforms with just i click. Its sophisticated Screen Space Ambience Apoplexy system approximates the effulgence or darkness of a surface based on its surrounding surfaces and how exposed it is to ambient lighting. This allows you lot to improve the visual quality of ambient lighting in your scenes by making the shadows of objects more realistic than ever before.

Fun act: both engines actively collaborate with external 3D studios to ensure smooth transition of 3D formats into the engine. For case, both Unity3D and UE4 support Universal Scene Description (USD) format developed by Pixar to back up asset pipelines and enable teams to work using asset references and overrides.

Overall, recall that you can always achieve the same results with Unity3D and at this point in time both platforms are perfected to the point where there is no visible distinction betwixt the visual quality they can produce, leaving the choice to your personal preference.

Notable Projects Made With Unreal Engine 4 and Unity3D

Both engines have been used extensively for AAA production and indie game development, and the virtually famous games of recent years accept been fabricated using both platforms.

However, in the terminal several years, the dramatic switch occurred and both platforms are now existence utilized not but for the entertainment industry, simply for more applied and business organisation-oriented solutions.

Due to the advances of XR technology, businesses, education centers, and manufacturing enterprises are extensively using XR applications to improve their workflow and profits in a myriad of means.

XR Projects Based On Unreal Engine 4

For example, a drug evolution company C4X Discovery uses Unreal Engine 4 to visualize molecular data, and thus, speed up the development of new drugs.

Visualizing complex data in VR enabled scientists to notice compounds from a new perspective, more easily spot design flaws, and also effectively interact across the earth without the need to be in the same room.

Visualizing complex information in VR has many applications. Another example comes from Air Canada , which used Unreal Engine to create a VR presentation for their top flight business concern class service.

It's worth noting that 97% of the project was done with Blueprints, non coding. The reason beingness is that presentation-oriented VR projects are easier to pull off than XR training, considering it requires more complex interaction than but observing something.

Let'southward talk about some XR projects that notable companies use to revolutionise their training and operations workflows.

XR Projects Based On Unity3D

Audi, a german auto behemothic, developed a modular VR training with xx dissimilar programs in several languages to improve their logistics, service, and production training workflows.

Image source: audi-mediacenter.com

VR training, according to Audi , is very popular amongst employers, and improves the learning process, the workers' motivation, and trainees' ambition.

INVISTA, a global Us-based polymer and chemical intermediates company, utilizes a Unity3D-based XR solution to simulate a working environment and train employees in VR, reducing grooming time, saving raw material costs and decreasing operational downtime.

Boeing, GE, United states Navy are using VR/AR applications based on Unity3D to train staff with greater efficiency, with benefits such as improved grooming retention, improved safety, and reduced operational downtime, to proper noun just a few.

However, companies employ Unity3D for presentational purposes besides. Take a look at this BMW 2019 showcase and try to approximate which i is rendered and which one is real:

YouTube Link

Summary

In the last few years both engines accept been developing by leaps and bounds, addressing their weak points and persistently post-obit the latest industry trends.

Information technology used to be Unity3D for mobile projects, and Unreal Engine for AAA-games, but things have changed so much since and so.

Both platforms are perfectly appropriate for creating circuitous XR solutions and indie projects alike. Both platforms are capable of creating stunning visuals and cantankerous-platform applications.

Although Unity3D supports more than platforms and is known for its cross-platform development approach, both engines are optimized for working with all the contempo XR tech on the market place. Many developers merits Unity is a proficient choice because of ease of use.

It all comes downwardly to your previous experience and surroundings you're working in.

Practice you accept lots of experience with C++ programming? Unreal Engine is the way to get.

All the same, if you're just starting out every bit a developer, then Unity's C# might be a more than practical  linguistic communication for beginners, because it has a bigger community and VR codebase surrounding it.

If your application is heavily focused on presentation and graphics, for example a desktop game with AAA-avails or visual presentation for business, and so, mayhap, Unreal Engine 4 with its Blueprints arrangement and bang-up visual furnishings out of the box is a way to become.

On the other hand, if yous're working on a circuitous concern solution that requires a lot of customization, iterative development, prototyping, and optimization, then learning Unity3D environs may be a not bad pick.

Carefully written report both platforms, understand what works improve for you, and remember that you lot can effort both platforms for free.

Good luck with your projects!

If you're looking to become a Unity developer from scratch, check out Circuit Stream'southward 24-calendar week live Unity Bootcamp.

QUICK FAQ

• Is Unity amend than Unreal?
  No. Both game engines are remarkable at what they do and you won't get wrong no matter which one you pick for your default tool. Information technology comes downward to personal preference, engine flows, user feel and type of projects.
  
  
• Is Unity or Unreal ameliorate for beginners / Is Unity harder than Unreal?
  Aye, Unity is easier to start with if you don't have much technical knowledge. The C# language syntax is easier to grasp, has fast iteration time and is more forgiving than Unreal'south C++. Unreal has a steeper learning curve. If you're not fond of coding you're complimentary to use visual scripting in Unreal using Blueprints, and Bolt in Unity.
• Is Unity losing to Unreal?
  Not really. Depends what industry niche are yous looking at. Unity dominates the mobile market place with more than than fifty% of all applications. If we look at the video games on Steam, 23% of them are using Unreal Engine vs xi% Unity. We accept to continue in mind that both Unity and Unreal are heavily investing in other industries such as AR/VR and Visual Simulations and numerous other segments via diverseness of extensions.
• What about pricing? Which one is more than affordable?
  That's an excellent questions since the pricing models between Unity and Unreal are completely different. Both have generous freemium options. Notwithstanding, if you decide to buy a business-oriented license Unity will cost you from $399 for Plus, $1,800 for Pro and $4,000 per Enterprise account per year. Check out the full pricing breakdown on the Unity Store.  while Unreal is going to take 5% royalties whenever your application gets monetized. Unreal also sells Unreal Enterprise Programme that comes to $1,500 per year and can't be used for game development.

Interested in XR Unity development or learning about AR and VR?

Take a expect at our class content and syllabus.

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Source: https://circuitstream.com/blog/unity-vs-unreal/

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