ive designed my landscape but now i want to add flowing water into my created river depressions, however when i use the plug in tools it remodels my bankings…any ideas?
sounds like the water body is writing into your landscape heightmap. on the water body actor (or each river spline) look for the Affects Landscape option and untick it, i think that stops it carving the banks. if the banks already got changed, the landscape has a water brush manager in its blueprint brushes list, you can disable or delete that brush and the landscape goes back to your own sculpt (a saved copy of the heightmap helps if it was already baked). then move the spline points so the river sits inside your existing depression and set the water level from the spline point heights instead of letting it carve.
if its a third party river plugin and not the built in water one, say which, the setting name is different per tool.