I heard this from one of Viewpoints competing companies: "BTW- Viewpoint is a beautiful renderer. The best at what it does! But, it is NOT a hardware renderer. The Shri renderer upon which it is based utilizes some OpenGL and D3d code but all the rendering is done on the processor and output." - is this true?
Yes, all the rendering is handled via software. This has several benefits. It ensures consistant appearance of your scene (different quality graphic's cards produce vastly different results). It also means great rendering as the VMP completely controls the pipeline - you know exactly what you will get.
The minimum requirements for the VMP are very modest and the rendering does not really take a powerful processor; so there is no 'hit' on the users PC because of the rendering in software.