LuxRender is a free and open source software rendering system for physically correct image synthesis. Developed by LuxRender
License: Open Source
LuxRender is known for its high-quality global illumination and realistic material system but has slower rendering times and a steeper learning curve. In contrast, YafaRay offers faster rendering speeds and a user-friendly interface, making it suitable for quick projects, though it may lack in material options and realism in some cases.