The most important part, the list of features:

ETXreaL
IMPORTANT: Changed media license for community contributions to "Creative Commons Attribution-ShareAlike 3.0 Unported"
  • Changed required minimum OpenGL version to 3.2 on Windows
  • 20 - 80% faster runtime speed by using better Visual Studio compiler options
  • Replaced VS 2008 and SCons project files by Premake 4.3
  • Changed default binary installation folders to bin/ to avoid conflicts between different architectures
  • Improved r_softShadows quality and speed with irregular shadowmap sampling like in Crysis
  • Implemented Exponential Variance Shadow Mapping to fight the VSM light bleeding problems
  • Optimized tangent space calculations for ET skeletal models (big speed improvement if r_vboVertexSkinning 0)
  • Fixed bugs concerning r_vboDeformVertexes
  • Added more ET specific keywords to the .shader parser
  • Added top-down view for r_showBspNodes
  • Added engine version to the console
  • Updated JPG loader to libjpeg 8c
  • Added Omni-bot 0.81 to default etmain game
  • Defaulted com_maxfps to 125
  • Rewrote HDR tone mapping to use correct RGB <-> XYZ <-> Yxy color space conversions
  • Added GUID system to generate etkeys which are sent as cl_guid
  • Renamed r_dynamicLightCastShadows to r_dynamicLightShadows


ETXMap
  • Improved ETXMap -map2map -format quake3 using additional support for worldspawn detail brushes
  • Improved ETXMap -map2map -format quake3 to support texture coordinates without GtkRadiant 1.4
  • Improved alternate BSP splitter algorithm for faster map compiles and better rendering speeds
  • Updated JPG loader to libjpeg 8c
  • Changed Unix home dir from .etwolf to .etxreal


ETMain
  • Added over 1 GB new high resolution textures using diffuse, normal and specular material information
  • Added replacement textures for battery and fueldump by Eonfge
  • Added high quality skyboxes and models by AVOC
  • Added fueldump additions by KeMoN
  • Converted original ET maps to the Doom 3 .map format and added an etx_ prefix to them


Minimum system requirements:
CPU: 2 GHz (Intel or compatible)
System Memory: 512 MB
Graphics card: Any graphics card that supports Direct3D 10 and OpenGL >= 3.2

Recommended system requirements:
CPU: 3 GHz+ (Intel or compatible)
System Memory: 1024 MB+
Graphics card: GeForce 8800 GT, Radeon HD4850 or higher.

More info: http://www.splashdamage.com/forums/s...-ETXreaL-0.3.0