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Unity 3D
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45
Experiences
Pros
22
Cons
22
Specs
Top
Pro
Lots of resources to learn from
Unity3D provides an exhaustive documentation where everything is given a full description supplied by a number of examples as well as video and text tutorials and live training sessions to understand the ins and outs of the engine. In addition there's an ever-growing community that can offer advice to help resolve any situations that may arise. Along with the official Unity resources, there are many high quality (and often free) third party tutorials available.
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Con
Very bad terrain
Native terrain creates a lot of draw calls which is bad for performance.
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Pro
Easy learning curve
The way the editor is structured, by setting scripts on objects, and the use of a high-level language, C#, makes it easy to learn.
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Con
Adds too many features without fixing earlier issues, rapidly increasing number of bugs that will never get fixed
Unity continues to add many new features without fixing earlier issues. Unity is either understaffed, overambitious, or both, resulting in a continual increase of problems and degraded experience across a number of platforms. Many bugs are reported daily and never get addressed, and there are many bugs from previous versions that are never looked at or fixed.
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Pro
Lots of assets can be found in the Asset Store
For those developers who can't afford an artist, or aren't skilled enough to create their own art, Unity features an Asset Store full of a wide variety of free and paid assets that can be easily added to a game. The Asset Store has more than just music and art. It also has code and modules that can be added to games including unique lighting or GUI systems. It also has powerful asset management and attribute inspection.
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Con
Bad UI tools
Way of creating UI is uncomfortable and inconvenient.
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Pro
Very popular
Unity is a proven game engine. It is used by a wide range of developers - from small indies to triple-A companies such as Microsoft, Paradox, Square Enix and Sega.
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Con
Hard to maintain projects due to vendor lock
Unity3D is proprietary, closed source game engine. Unity asks money for features like basic version control support, etc. It is impossible to migrate a game from Unity3D in case performance does not satisfy growing requirements of a project.
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Pro
Allows for rapid prototyping
Unity's modular system and usability allows for quickly developing a prototype of an idea. It has features like drag & drop editing, shaders, animation and other systems already in place to allow diving right into developing a game.
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Con
Asset store is required to replace engine functionality
You will need to, for example, buy an input manager asset off their asset store in order to replace their own terrible inaccessible input manager.
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Pro
Great community
Great Community support through the Forums and Unity Answers.
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Con
Moderators on forums are sometimes arrogant
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Pro
Great editor
The editor GUI is very powerful and intuitive. It allows pausing gameplay and manipulating the scene at any time as well as progress gameplay frame by frame. It also has powerful asset management and attribute inspection.
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Con
Weak memory management
.Net libraries are slowing it down, memory safety is compromised, classes have to be implemented to manage objects in memory, like object pooling.
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Pro
Can be used for free
As long as the development company makes $100k or less, it can use the free version of Unity to release games.
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Con
Garbage collection can't be turned off
Given the use of C#, the memory control is out of the developers control, this can be good, but not controlling memory means that the garbage collector can trigger at any time and ruin performance.
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Pro
Works with 3rd party IDEs
You can use any C# IDE for it, but the ones tested which have Unity integration are: Microsoft Visual Studio MonoDevelop Visual Studio Code (much faster than VS, but a bit harder to set up for Unity development) JetBrains Rider (very fast, has lots of functionality and best Unity integration, but it is not free)
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Con
Bad batching support
Draw Call Batching is done automatically and does not include Skinned Renderers (eg. characters). Also for dynamic batching, meshes need to have less than 900 vertices.
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Pro
Has a great animation system
Unity provides a great state machine animation system called Mechanim allowing to separate animation from the model and assign the same animoations to different models.
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Con
Very self-centered engine
Unity3D uses very unique approach for doing things. Most of the knowledge acquired while using it, would be completely non transferable to other engines. Advanced Unity3D programming is really dealing with Unity3D bugs, and finding loopholes around engine issues - nothing to do with graphics, etc. Skills which would be valuable with other engines.
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Pro
Over 20 platforms
Unity offers over 20 platforms for publishing including mobile, console, web, VR, and more.
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Con
Dark UI theme not available in the free version
Dark theme, which is a must for prolonged work without eye strain, is only available with one of the paid monthly plans.
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Pro
Versatile
Not tailored for specific types of games (like Unreal...), so it won't get in your way if you want to make something unique.
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Con
Encourages bad coding practices
A lot of Unity code feels like a hacked blur of arguable coding practices. C# and .Net usage in Unity is questionable. A lot of the API is done in "C Style" (public static methods, available at all times), encouraging the use of public fields for everything, a lot of questionable implicit casting. The list goes on.
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Pro
Powerful standard shaders
The built in standard shader in Unity 5 is incredibly optimized and supports PBS/PBR.
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Con
Increasing number of bugs
With each new version things may stop working ,for example with Android, some bugs are never getting fixed, like the freeze bug with adb.
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Pro
Very optimized
Unity runs very smoothly even on systems that are considered "weak" by today's standards.
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Con
Mobile builds (Android, iOS) take about 18MB at least
Even a Blank Project, Needs 18MB for the APK file (on Android).
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Pro
Well structured
Overall, a coherent engine with a rational approach. People who complain a lot about being forced to hack around it usually do not read the docs, like the one that describe orders of execution, or specific functions hooks and such. Some like to say it lacks raw power where people who are used to standard optimizations have no problem. For example It is not uncommon to encounter users who complain about low FPS but forgot to activate occlusion, flag static elements, activate animations culling, and so on. As for complaints about C#, people who are transitioning from C++ were already bad at C++ before being bad at C#. They often come from the PC world where the sheer power of today's machines is very forgiving compared to the platforms we had to develop for in the 80s~90s. One of their errors is for example to never read this doc.
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Con
Asset bundles can be cumbersome
Asset bundles are a way to load external resources that are not packed with the game or application and offered as a separate, optional package. However, they may not be compatible between versions or even platforms (you have to create them separately). Asset bundles need to be loaded and unloaded, avoid concurrent loads from web or cache or a naming collision can happen. You can find workarounds with static objects (load obj files and textures by code), but for animated game objects you are pretty much stuck with this.
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Pro
Can create custom forms and tools
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Con
Price is very high
Cost is based on Revenue: less than $100K = Free between $100K and 200K = $35 a month per seat greater thank 200K = $125 a month per seat
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Pro
OUYA support
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Con
New il2cpp script backend is show stopper to some iOS projects
Il2cpp script backend is required to build arm64 app, but it's still very buggy and not production ready.
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Pro
Flexibility is provided by a strong component programming model
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Con
Waisted resources
Slow, buggy, expensive and 1000 other problems.
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Pro
.NET functions can be used
ReactiveX,async/await, etc. .NET functions can be used in Unity.
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Con
Comparatively high learning curve is putting it nicely. Expect to spend days upon days researching basic functionality.
Although C#, JS, and Boo have documentation available online, it can still be difficult to understand the library and Unity's component based system.
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Pro
Great extensions are updated daily on GitHub
GitHub has a lot of extensions.
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Con
Bad model importing
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Pro
Has awesome plugins
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Con
Bad input
Their input manager cannot be accessed via code. If you want to update controls at runtime (which any PC game should be able to do), you'll have to roll your own. Except joysticks are also not available via code.
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Pro
Free for mobile development
Unity allows free mobile development. There are some limitations.
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Con
Bad raycasts
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Specs
API:
DirectX 10, DirectX 11, DirectX 12
Dev platforms:
Windows; OSX; Linux
Desktop targets:
Windows; OSX; Linux;
Mobile targets:
Windows Phone; iOS; Android; BlackBerry 10; Tizen
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Built By the Slant team
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