Just another trial with textures, planes, and helpers inside iClone3. There is a Cloud Layer and a Bird simulation material file which will be provided for those who want to give it a shot on their own. The Bird material image is applied to a flat plane and the cloud layer is applied to a ball or Sky Globe as a replacement material. With the Sky Dome resized to approx. 95 % smaller than the standard sky and a rotation applied, it appears to be moving clouds or fog.