Cloud Headcanon · 7:22pm Oct 10th, 2017
The distinctive visible swirls on the clouds of Equestria aren't just an artifact of cartoon resolution: they're a product of cloud manufacturing, imprinted on pegasus-industrially-made clouds by the mighty cyclone turbines of the Cloudsdale Weather Corporation.
(And are kept there deliberately, partly as a maker's mark, and partly because they let weather teams tell from a great distance whether a given cloud is company-issue, unofficially hoof-made, or even the product of wandering wild weather.)
Not to mention the overall artistic aesthetic it gives the sky.