There wasn't enough dust to show footprints.
The snow here had been trampled, and was too hard to show footprints.
She swept the light over the floor, which was stone and didn't show footprints as clearly as the dirt floor in 823's building next door.
The snow base showed footprints, so many and overlapping that they could not be counted.
Every doorway showed the identical chamber, ter'angreal, footprints and all.
It's been a dry year, but trees hold moisture and the earth there ought to be soft enough to show footprints.
The red dirt between the inner and outer perimeters was always rolled smooth so it would show footprints.
The terrain is too rocky to show footprints.
If soft enough to show footprints and vehicle tracks, they retain them for many years.
It did not show footprints; if Hishtoo was gone, there would be no tracking him.