Hello ! 
Does someone know how can i make that type of translucent island water ?
with some waves ? If you know a site or a video let me know i’m intrested !
Thanks a lot ! Have a nice day !
theres a example project on making water in the learn tab of the launcher. theres also a million tutorials on making water materials on youtube. not knowing where that picture is from i cant say on that particular example.
I looked a lot of videos on youtube and all that stuff but they don’t show how to make waves
and i didn’t found one tutorial that make really translucent water like that 
ant this pi ture come from here : Tropical Island Environment in Environments - UE Marketplace
theres two ways i can think of to make waves and its dependent on the look and feel your going for. first theres using normals which will give the appearance of depth and detail to an otherwise flat plane. then theres displacement which will move the actual verts.
