Hello! All (4) light sources in the mpd-file below the water surface were modified in the povray source with: color rgb 3*<1,1,1> fade_distance 125 fade_power 1 and the ligths in the sky to spotlights, like f.i.: light_source { <5,-1308,-95> color rgb 3.9*<1,1,1> spotlight radius 15 falloff 5 tightness 10 point_at <10,0,-115> } The color 12 was slightly modified and fog was added. I tried the "media" directive from povray, but still without a success. For questions or comments, feel free to mail to andreas(dot)weissenburg(add)t-online(dot)de