better world terrain diversity

pandacookiesims​ have you tried using the move objects cheat to make little waterfalls? If not, you can use the Fountain Decorations Spraying Water Emitters and any garden rocks. With a bit of manoeuvring you can lift the rocks up, enlarge and stack them and hide the water emitters inside them. It's a bit easier with the Grotto Cascades from the Riviera Retreat kit but can be done just with the Base Game and it creates a pretty waterfall effect for gardens and ponds. There are some different rocks in debug too that I've just used on my lake with a boathouse and blended with the Grotto Cascades.