This was a picture I took earlier, trying to replicate another users night lighting from a previous version. It’s custom, and I had tweaked the clouds by hand to try to match the original as best I could, and I think its pretty close.
The clouds always look better when you make them taller by dragging the top, and bottom lines apart. The cumulous clouds always look good to me. The ones that tend to look a bit ropey, usually on live weather, are the very thin, wispy layers of the stratus type. Other than those I think they look great.
Regarding the PG, it’s true that quality differs from city to city. Some of Japan’s PG is pretty good, as is Venice.