Tile has it's own controls for tile and grout, this means color, specular, reflection and bump can be adjusted independently
of each other. Grout uses turbulence for bump and color while gradients are used to create the tile and it's bump.
Below is what the render tree looks like.
I have placed all the nodes for adjustments at the top of the window to make it easier to work with. To change your texture projection you can use gradeint8 property editor - texture tab.
Here is an example of using the vein texture in the tile phong diffusion channel.