FPrime Rendering System is described as 'Realtime rendering, giving you instant feedback on every step of your work. Interactive texturing, lighting, shadows and radiosity. Even Nodes! The key tool to efficient LightWave workflow' and is an app. There are more than 25 alternatives to FPrime Rendering System for a variety of platforms, including Windows, Mac, Linux, Autodesk 3ds Max and Sketchup apps. The best FPrime Rendering System alternative is LuxCoreRender, which is both free and Open Source. Other great apps like FPrime Rendering System are MoonRay, Adobe Dimension, POV-Ray and RenderMan.