Phongwarp textures and other Phong improvements Source's phong shading, introduced in Source 2006, has been upgraded with additional features such as reflection tinting, albedo tinting, phongwarp textures, and more. Conditional statements New conditional statements for use in materials to optimize them for lower-end machines. Hardware Morph (HWM) flexes and Wrinkle maps A new, powerful facial animation system, with support for textures that add fine wrinkling detail to the face during flex animation. Motion blur Cheap and simple camera motion blur. Improved High Dynamic Range rendering Remade HDR tonemapping that better fits outdoor scenes. Shadow mapping Special dynamic lights such as the player's flashlight can now cast high-quality dynamic shadows. Soft particles An all-new, artist-driven particle system, replacing the old hard-coded particle system. New since the Source 2006 engine branch are:Ģ007 Threading Logic, rendering and audio have been threaded for performance gains in multi-core environments. The 2009 and MP branches do not have a different feature set, but they are incompatible with 2007 due to various under-the-bonnet changes (which include a different SteamID scheme and Mac OS X compatibility). There are actually three Orange Box branches, referred to in the SDK Launcher as Source 2007, Source 2009, and Source Multiplayer. The Orange Box builds on the original Half-Life 2 branch, requiring its content installed to work. Despite this, the Source 2013 and Source 2013 Multiplayer branches were released in 2013 as more direct upgrades for these games. It existed and was maintained side-by-side with the Left 4 Dead engine branch until 2010, when it was obsoleted by the release of the Alien Swarm engine branch. The Source 2007 engine branch (formerly Orange Box engine branch) was released in 2007 with the Orange Box (, , ), succeeding the Source 2006 engine branch.
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