Demonstration of the 3D Irradiance and True Color Capability in TracePro 7.1. How to show irradiance and true color on all surfaces and objects in your system view with TracePro. TracePro® is used for the design, analysis and optimization of optical and illumination systems. With an intuitive CAD interface and powerful interactive optimizers, TracePro offers a powerful optical design environment with a short learning curve to accelerate product development.