For me, it's like this:
- On approaching a ring, it looks fine, a semi-solid ring.
- Getting closer, you see tiny spaces indicating it's not a solid ring, great.
- Closer again, and straight ahead the ring seems to empty out, and is sparsely populated in a very not-random-looking manner.
- Almost into the ring, and rocks start popping in in clumps.. not ideal.
Once in the ring proper,
- Close up rocks look great. A little low-res, but that's down to the specs of my machine, no problem at all.
- In the mid-distance, the rocks have extremely low detail, like big malteasers. They look awful.
- In the far distance, they're just small white blobs, which is fine, except there's no smooth transition between these 3 types. It's big detailed rocks, small brown malteasers, faraway white dots - 3 very noticeable "bands". It's very weird and artificial looking.
That said, I did just drop into a (non RES) ring last night and it looked great. The main difference was the dust(?) which blurs the mid-distance rocks. When that's present, it all looks great. When it isn't, the lack of detail and banding between the 3 layers is very jarring.
On another note - back in 1.2 I remember being in some rings, and you could see extremely fast moving rings in the distance. I don't know if they're specific to certain planets, or if they've been removed; but I haven't seen any like that in months.
I hope 1.4 looks somewhat close to this again..