Thanks for the comment Apparently there is some confusion about my two textures -. this is a dev-water texture with modified colors and fog, the other is an animated, clear the "refraction" are not part of a water texture, but its own animated. So in order to achieve the realistic effect, you must a) use the "Realistic Pool Water" as a water and b) every all under water parts of the pool 1 unit thick, "refraction" set-textured func_illusionaries. In short, the beautiful effect occurs only with a combination of both textures.