Tellion, Problem with clouds solved. I started adding your \BoulderCo files one by one until I found the culprit. I did not have the optional lightning feature from AVP installed, so did not have the lightning.png texture file installed. As soon as I installed your "4 Astronomer's Lightning.cfg" file, without having the lightning texture installed, all my clouds disappeared. So, as soon as I installed the lightning texture from the AVP download, my clouds returned. Optionally, for anyone who does not want the lightning feature, they just have to make sure to also not install your lightning.cfg file.