They can't have different tex because it's not solid matter, it's dust. They can only be more transparent.
Variation in transparency
is the texture.
A good way to approach it would be through simulations, but to simulate that level of detail in the rings and with a nonuniform gravity field...
True, perhaps computers don't have a very good intuition for it, either. Maybe sufficiently, though, to shed light on Arigato's point, that some planets can't have stable rings. Space Engine assumes that many rocky planets have stable rings. Science fiction assumes it. My intuition says that it should not be too rare. Saturn has many moons, which complicates the gravity like the geoid, weakly, though, but in another sense more complex since the gravity is shifting due to the orbital motion. But it seems reasonable that a very messy geoid, as well as a very elliptical orbit close to the host star, would cause problems for a stable ring.
But for this there should be actual data from Kepler, though probably difficult to interpret. A simple Google search gave me this paper:
Systematic Search for Rings around Kepler Planet Candidates: Constraints on Ring Size and Occurrence Rate
Kepler planets have a bias towards short orbits, i.e. close to the star so planets subject to high tidal forces. Is that a limiting factor?