Source 2 was announced at GDC 2015, with a promise that the tools will be made available in Early 2015.
The Source 2 Engine was officially revealed as part 3 of the Dota 2 Reborn announcements on June 15, 2015.
Dota 2 is the first game that will recieve the the Source 2 Engine treatment. Source 2 includes technology for rendering improvements, performance optimizations, higher fidelity content, and richer, more dynamic games.
Improvements over the Source Engine:
- Lower Latency Input: The engine Responds faster to mouse clicks and keyboard events.
- Tiled Map System: Specifically geared towards dota 2 the Tiled Mapping system provides for an easier to manage and more consistent workflow when developing custom maps.
- Enhanced Performance:
- Highly scalable: Runs Faster on older machines, Maxes out high end desktops as well
- Multi Threaded: Uses all available cores
- 64bit OS
- Use all available memory
- Supports DirectX11, OpenGL Vulkan
- Virtual Reality Ready
- Content Streaming
- Improved Audio
- Physics: Includes Valves inhouse Physics Solution for more stable collisions and simulations
- Rendering Improvements:
- Less Constraints: Maps in Source 2 can be authored using powerful geometry editing tools and may contain complex meshes which are free of convexity constraints
- Freedom: Designers can create worlds that were not possible to build in the previous engine
- Lighting: Unified lighting system ensures all game assets have access to the same rendering feature set
- MultiPlatform: Natively uses OpenGL rather than a wrapper so as to improve performance