Gradually uncover occlusion cards

Hi, i have question regarding the occlusion feature. Is there a way or addon, where previously uncovered parts stay uncovered? That way you could slowly reveal more and more of your card. Thanks for your answers:)

Just for clarification. Are you requesting an addon remembers the previous state of an image occlusion, such that further occurrences of the image retain the covered/uncovered status?

Hi there, yes thats exactly what i mean! Maybe i am really underestimating the difficulty of said feature, but i thought it might be worth to ask here, who knows, maybe there allready is such a feature in place.