Mosaic Generator in Substance Designer

 Here it is, most of the graph is straight from the Quick Tip Video from Substance 3D video. I've made some changes to it but you can download it from the perforce server in the source assets> textures > substance folder. 

    To the left of all these graphs is a frame with some test images I used. You can also adjust the HSL values and adjust the image with a curve node if needed. Drag and drop your image here and hook it up to the dot node. Your image should now show up in the 3d view. 

    IMPORTANT NOTE: Substance Designer likes images that are square, 2048x2048 is usually fine. Anything imported that is not square may cause it to break. 

    Here you can adjust the levels of the greyscale image. This can affect how the mosaic lines show up. Play around with it to get a result you'd like

Here I have included a way to get color variations on some tiles. It uses a gradient map with a random greyscale map. You can turn this off with the switch node at the end.