A real water feature would be neat IT SEEMS! BUT:
1} real water doesn’t look right next to scale things.It’s “too big” believe it or not.
2} water would have to be contained with a really heavy plastic liner {or rubber like real ponds} to contain it.
3} water splashes from a “waterfall” or “rapids” and would damage scenery around it, including rusting train parts.
4} It would have to have to be tinted blue to show up as “'water”, clearness is not desireable at scale as it won’t look like water, and painted surfaces will wear down or thin out with the water in it.
5} algae and green slime WOULD grow so you would need to treat it to keep algae from forming. Especially if exposed to ANY sunlight, and even flourescent light will cause it to grow.
6} you would need a filter to keep the pump clean and pumping and they are a pain to maintain,especially from the algae, which will CLOG and KILL a pump. The algae WILL grow.
7} It will evaporate and will need to be refilled often. With water treated for anti-algae growth.
8} it will add humidity to your layout,a nd many layouts are ruined by humidity, hence the need often for a dehumifier to keep humidity down and from ruining the layout in a basement, for example…
9} Blue tinting will be removed by the filtering process leaving you back to #4.
10} did I mention things RUSTING around natural water? How about CORROSION?
HOW do I know all this? I have a 1:1 waterfall/pond system and used to have several fish tanks to maintain. This year I am NOT maintaining the waterfall/pond as I need a new pump, new filtersystem, and tired of the maintenance. Algae KILLED my pump last year, and the filter system plain gave out. Rep