RStudio

A brush-based CSG world editor inspired by QeRadiant and Worldcraft

https://github.com/ViciousSquid/RStudio

• Custom OpenGL/PyGame engine supports immediate "drop-in and play" (like CryEngine Editor)
• Real-time lighting with optional stencil shadow
• Entity I/O system inspired by Half-Life 2
  
• Volumetric fog, glass & water shaders with configurable surface parms
  
• Terrain generation, moving surfaces, pickups, OBJ model support
  
• json level format :-)
• Custom physics engine with configurable parameters
• Fully modular and open source (MIT License)