Joey Carlino writes:
Draw footprint tracks with curves! This method works well for flat surfaces, making it work on bumpy terrain is a little more complicated. To do that, you need to realize the instances and use the proximity node to make the footsteps shrink wrap to the surface. When you do this, the material will break, and you can fix that by getting the UV of the plane and sending it to the shader editor to use. It can be done, but it's more complex and in many situations footsteps like this would be on flat ground anyway.