If you’re interested, my sketchbook has some examples of textures for animated water, with breakdowns. It’s not PBR, but might help since it’s using tiled textures.
It's like asking why there's no good road PBR textures, water shaders have so many different requirements and needs and layers that no one size fits all solution is going to exist. Same with roads, terrain, grass, etc.
i must have a dozen different pbr water shaders for unreal. Rivers, oceans, ponds... every type of water. All from different authors. as mentioned, of course you can transport the textures anywhere you want but the shader itself is always dependent on the language / engine.
I want to know that, because I am searching multiple sites and basically 0. So I bother to do them from photos and them seamless tile them, but still,... I don't want to do them in 1 software with tons of procedurals. I want it to be portable textures.
Water is really simple as a basic PBR material. Glossy with IOR 1.333, dielectric fresnel, and refraction. The trouble is with refraction rendering, all kinds of different approaches possible, with different performance implications. Also, when any wind or physics gets involved, then you need simulation and volume…
Thx @Eric. I am interested. I was looking at textures.com, Megascans,... Now I see that Unreal store has a lot and I get more results if I search "water shader" and not Water PBR. I am mostly looking for what looks nice for terrains such as large scale mountain range, flowing rivers, emerald lakes, no animation needed for…