okay. dunno what kind of water shader you have there. it should work with basic blockout meshes or any static mesh props. atleast in 5.3 and 5.4 it works. not sure which version you’re on.
on the topic of sc2d mirrors… if you get them to work properly let me and @Barisbkc 's thread know. he’s an entitled feeling whatever. but he needs that stuff too for his lowend archviz project. i couldn’t figure out the projection math. maybe you got more talent or are smarter than me. 