Gabriel, here is a quote from a thread in Visual3D.NET that I think you are referring to:
Suva3D is targeted for free non-commercial usage just as Visual3D is. You do not neccisarily have to license Suva3D to use Visual3D comercially, Visual3D comes with the open-source DotNet3D Engine which is a C#-implemented, DirectX-optimized engine based off of OGRE and Axiom. Though they are both XNA and shader-based next-generation engines, Suva3D is the higher-end engine and usage of it is heavily suggested, especially for non-commercial usage considering that it will likewise be free for that and certainly for any AAA professional titles being developed with Visual3D.