Used in Siemens NX, Dassault Systèmes Catia and Solidworks, along with other leading product design packages, the Iray rendering engine and MDL (Material Definition Language) deliver predictable, simulation-quality photorealistic imagery with full artistic freedom. In this talk we will present our approach to enable NVIDIA RTX technology and RT Cores within Iray. We will present architectural decisions made to leverage the latest version of OptiX and explain what affects performance in practice.