Unity

is an integrated authoring tool for creating 3D video games or other interactive content such as architectural visualizations or real-time 3D animations. Unity is similar to Director, Blender game engine, Virtools or Torque Game Builder in the sense that an integrated graphical environment is the primary method of development.

Simple

With Unity 3, we've put tremendous effort on world building tools * so you can assemble and tweak your levels at the speed of thought.

Edit. Test. Play. With Unity, testing your latest idea is never more than a click away. This lets you drill down to find the fun, then polish it until it's perfect.

Target platform can be switched instantly, so you can develop from a single source for mobiles, web, PC/Mac, and consoles.

Powerful

We rewrote Unity's rendering pipeline so your games can look the best they can * and get a 50% performance boost on top.

Unity 3 brings Beast lightmapping and Umbra occlusion culling to the table * a key part of making games look great and run fast across all devices.

Design the perfect aural ambience with our new integrated audio filters and in-scene editing tools. Captivating your audience has never been easier.

What's New in 3.1

Unity 3.1

Huge scale benefits for productions of all sizes.

Unity Asset Store

With over 250,000 users worldwide, the Asset Store gives you benefits of scale the world's largest game developers can only dream of.

While developing, you can easily leverage the work of other Unity users in your productions.

When you're done with your game, add an extra stream of revenue by putting your work up for sale.

Find out more

Additional Improvements & Fixes

As usual, we added a couple of improvements and fixed some things...

New Features: Managed .NET DLLs can now be placed in the project folder and can contain script code, including MonoBehaviours, EditorWindows and ScriptableObjects. This allows you to move any code into a DLL, making code sharing between projects easier, and making it easier for middleware developers to create libraries without sharing the source code. This was introduced in Unity 3.0 but was not mentioned in the release notes.

Scripting: Added GL.InvalidateState() to flush the internal renderstate cache in Unity. This is mostly useful when writing native code plugins that access the 3D device.

Audio: Added AudioSettings.outputSampleRate. Returns the mixer's output rate; use this to calculate the precise hertz range returned from GetSpectrumData().

Fixes: Editor: Fixed out of memory errors when editing very large terrains due to the Undo system.

Editor: Fixed "too many open files" error when reimporting a large project with many shaders on Mac OS X.

Editor: Some textures would not say "Texture not yet compressed" when importing with the "Compress Textures" preference turned off.

Editor: Fixed a bug where upgrading a Unity 2.x project with normal maps would leave some normal maps not marked as Normalmap type properly.

Terrain Engine: Unity 2.x Soft Vegetation tree shaders had lighting upside down :)

Shaders: fixed Surface Shader compilation errors with large custom output structures.

Shaders: wrong syntax in UnityCG.glslinc file (for GLSL shaders).

Graphics: fixed Projector crash in some circumstances.

Graphics: fixed tangent vectors not bound correctly with GLSL shaders on some GPUs.

Graphics: fixed dynamic batching corrupting vertex colors on Direct3D.

Graphics: fixed GL.TRIANGLES rendering with large triangle counts on Direct3D.

Graphics: fixed some hiccups when changing non-uniform scale of meshes.

Graphics: Fixed dynamic batching index overflow.

Audio: GetOutputData/GetSpectrumData API changed so it accepts an pre-allocated array instead of allocating on every call. Old API is deprecated and marked obsolete.

Unity iOS Fixes: Fixed render texture support on iPad with OS 3.2.

Fixed video autorotation. Pinch zoom gesture now disabled during video playback.

Fixed stripping of GUI scrollable area.

Fixed OpenGL ES 1.1 cache invalidation, which was sometimes causing visual artifacts.

Fixed render texture memory leak.

Unity Android Improvements & Fixes: Plugins folder is moved; it now uses Assets/Plugins/Android to scan for plugins.

Plugins now support standard Android project layout; /assets, /bin, /libs and /res will be merged with the final package.

Added 'update necessary' notifcation dialog for Samsung devices running pre-2.2 OS firmware.

License Verification Library (LVL) no longer causes a crash.

Added iPhoneUtils.isApplicationGenuineAvailable() to be able to determine if application integrity can be confirmed or not.

Ignore .meta files (with external version control) when packaging the .apk.

Assign DefaultImporter to platform specific plugin assets.

Custom manifests are now merged with the properties from the editor (like Bundle Identifier, Version and permission flags).

Ship UnityPlayerActivity as source code template for writing plugins with custom activity classes.

Added support for translucent (RGBA 8888) rendering surface.

com/unity3d/player/UnityPlayerActivity.currentActivity field is now found at com/unity3d/player/UnityPlayer.currentActivity.

iPhoneKeyboard is now displayed on top of the application; it supports the basic soft keyboard layouts (URL, Email, Phone, etc).

PlayMovie is now displayed on top of the application (instead of in a separate activity); fixes the screenCanDarken issue while playing movies.

The editor now checks for device specifications before trying to deploy in Build&Run.

The editor will try to locate the JDK based on information stored in the registry on Windows.

Fixed C# assemblies being loaded from the wrong thread; was causing crashes if external classes were loaded late at runtime.

Fixed render textures on OpenGL ES 2.0.

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