LuxRender is a free and open source software rendering system for physically correct image synthesis. Developed by LuxRender
License: Open Source
POV-Ray is a powerful, customizable ray tracing software suited for static scenes and mathematical rendering, whereas LuxRender excels in photorealistic rendering with global illumination and GPU acceleration. While POV-Ray is more focused on scene description and customization, LuxRender offers better support for modern rendering techniques and realism.