I bring good news about masking clouds
I have found with enough research on internet,
there are satellite images calls AMO.
constantly shows the Color of the Earth and clouds
in total there are at least 2 million of these images, each with a resolution of 6k or less
although the frames are different days and years, they can be easily edited and combined
into potoshop, to create the first map of clouds at 100K resolution!!!
Unfortunately, I don't know if the best solution
to a manageable model of the Earth