in a static level without day/night cycle you can to some degree cheese it, rather cheap. means… if you don’t rely on athmosphere and your horizon is covered.
you just gotta sync your visible skybox and a “custom” aka baked skylight hdri for the sun/sky reflection. just put the specular scale to 0, so… the directional will not contribute to water or any reflections. the whole sky reflection is replaced by the hdri. the visible sky can have any effect, but it will not show up in the reflections. it doesn’t do that either way, as i have set up my test level.
you just gotta bake a skybox for the desired light position in the sky in the level and maybe some clouds. the whole thing requires epic settings, afaik. unless you wanna customize it for your case.
thing on the right is a glass panel, btw. it can totally reflect anything.
