Hey there, thank you for getting in touch and for your support!
Could you share some additional details regarding your tile setup and how exactly this effect is supposed to behave? A screenshot or video of any similar effects will also help, as the more information we have, the better insight we can provide!
Oh, thank you for letting us know that you've solved it!
Unfortunately I'm not sure on what to suggest regarding this particular type of shader, I'd probably resort to scripting in order to establish rules / behaviors for the tiles and also to control certain material parameters.
Please let us know if you have any further questions, we'll be happy to assist.