Thomas Suurland, better known as the guy who renderers über photo realistic cars ( http://www.suurland.com/), has launched a new site called cg-source.com. If you look at his car renderings at http://www.suurland.com/, you can see that he definitely knows what he is doing when it comes to 3D and V-Ray.
His new site sells high-res textures and he also has some great, free maxscripts.
This image shows the process on how to use the FloorGenerator, MultiTexture Map, and a MultiTexture of floorboards to create a dynamic floor that can be any size, it will never tile and it can still be seen up close:
An rendered example of the products in use: