The sounds of your environment can be perceived different ways. The way people usually perceive them on a daily basis is as noise.  You normally don't pay much attention to that noise. A deeper way to perceive a soundscape is Nature Fantasia. With the right intention, noise temporarily ceases to exist and new aesthetic possibilities are available. Any sound could potentially be perceived as a timbre. Nature Fantasia is the combined timbres of any soundscape all functioning simultaneously, integrating with each other to create music.
         The structures are often musically intricate similar to 20th century experimental textures from composers like John Cage and Frank Zappa. The approach of Zappa's synclavier composition Waffenspiel from Civilization Phase III is very much akin to Nature Fantasia. He uses sounds of human-made objects and nature as instrumentation for his intricate musical ideas. Cage's 4'33 is his way of demonstrating faith in silence. He said, "Wherever we are, what we hear is mostly noise.  When we ignore it, it disturbs us. When we listen to it, we find it fascinating."
         Nature Fantasia is influenced by your mind and vice versa. You are not only listening, but also partaking in its creation if you decided to. The same way a musician might think when improvising music, you could think of your own sound events to partake in the music. Nature Fantasia will adapt corresponding with your mental sound events. When heard properly, you will feel the close interaction between your mind, your current soundscape, and The Gods simultaneously.