Markings with this Rule applied can have variations in the opacity across the marking. In cases where this requires an additional gene or requirement, such as with the Peacock variant of Leopard Appaloosa, this Rule will not be applied to the marking to make it clearer when markings can be freely Faded.
This does not fade out so much that it makes edges appear gradiated.
It should not fade more than ~50% opacity across required portions