差分
A post that is part of an image set containing a base image and one or more alternate versions. Some part of the base image must remain unchanged (usually the character's pose).
Common examples of changes within the set are:
Images in variant sets must contain intentional, significant changes made by the artist. The following do not count as part of a variant set:
Not to be confused with variations, which are multiple variations within the same image.
If the set contains 6 or more images, use large variant set.
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