And then there were 21—free ray tracing programs

In the process of preparing our 2019 Ray tracing and Rendering report, we have searched for all the ray tracing programs and suppliers we could find. The report is about geometry-based ray tracing and does not embrace field, optical, audio, or other non-3D (virtual or real) ray tracing applications or software. We have identified 71 raytracing programs from integrated to stand-alone and plug-ins. Of that population, we have found 21 that are free, including the ones that are free until one makes over $100,000 using the program. One of the newest entries into this category is Nebula in Montreal and