Hey there @AN-gamemaster! Welcome back to the community! So the UE5 water system doesn’t have a preset for waterfalls as of yet. Likely due to the water plugin utilizing landscape brushes, it isn’t very effective at “Seamless” for waterfalls especially if it’s a cinematic.
Faking it is often better than fluid sim if you can’t render fluid sim! Usually we’d lean towards Niagara for the spray and a panning/world shifting texture on an SM.
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A couple of references:
CGHow:
Tharle has a whole video series on how to do this but also made it a marketplace asset.
