Okay, time to use your own evidence against you.
In your photo, the wisps of cloud at
A are light grey (translucent) and do not silhouette against the moon when they cross it: the moon shines through them. The clouds at
B are black (opaque) and silhouette when they cross the moon. The clouds at
C are light grey (translucent) and do silhouette then they cross the moon.
In the cartoon, the sky at
A is black but does not silhouette because it is not cloud, just dark sky. At
B the sky is lighter are therefore cloudy, and these clouds do not silhouette as they cross the moon. At
C the clouds are even lighter and yet silhouette against the moon. Why? Or are these special clouds that know where to turn opaque.
I rest my case, numbskull.