I have a very complicated question here.
I need to find a way to create dirt tracks. For example I have this wheel that will be rolling in some dirt. Well the dirt is light in density and about half an inch thick(as thick as a wooden pencil).
When I have this wheel rolling along thru the dirt I want to be able to see the trail marks it leaves behind. I am not looking at a shoty way at doing this. I will be using either particles or bump maps to help create realistic dirt particles. So if you could imagine each dirt particle has a certain amount of depth to it…so as the wheel rolls in the dirt the dirt, the dirt will not only sink down and leave a trail, but will also cling to the wheel itself.
I know I know. very complicated. I was hoping to wing this if at all possible.
ps-If I could animate the NOR(to create bump maps) I could invert the settings within a confined area that I want the dirt to sink and where I want it to be elevated. So as the wheel passes over the dirt…that area it passes over can be given different NOR values to sink the dirt. Maybe there is a better solution? But now I still don’t know how to create dirt that clings itself to the wheel as it passes thru the dirt.