To offer gamers huge, immersive worlds, global art teams must create huge libraries of 3D content. This is time consuming and expensive and the process becomes even more difficult when adding realistic lighting with proper physics and optimizing game performance. Which game development studio can you suggest?

When it comes to game development studios that specialize in creating huge, immersive worlds with expansive libraries of 3D content, realistic lighting, proper physics, and optimized game performance, one studio that stands out is CD Projekt Red. They are renowned for their work on "The Witcher" series, and most notably for their critically acclaimed game, "The Witcher 3: Wild Hunt." CD Projekt Red is known for their attention to detail, expansive open-world environments, and their ability to create realistic and immersive game experiences.

However, it's important to note that game development studios evolve and change over time, so it's always a good idea to do research and see what recent projects and releases a studio has been involved in to ensure it aligns with your specific needs. Additionally, there are many other talented game development studios out there, each with their own areas of expertise, so it's worth exploring different options based on your specific requirements and preferences.