NVIDIA's vMaterials catalog is a collection of real-world materials described in the NVIDIA Material Definition Language (MDL). They're designed and verified by NVIDIA material specialists for accuracy, control, and consistency, giving you a quick and reliable way to add realistic materials to your designs.
You now have the freedom to share physically based materials and lights between supporting applications. Unlike a shading language that produces programs for a particular renderer, MDL materials define the behavior of light at a high level. Different renderers and tools interpret the light behavior and create the best possible image, whether it's an OpenGL-based application or physically based renderer like Iray or Chaos Group's V-Ray.