写真模写 写真トレス 写真参考 さんじも さんじに studyportrait study photostudy photo_study
An image that was inspired from a photo, or otherwise based on photographic source material, including video.
Artists will sometimes indicate that they are replicating a photograph (写真模写) or even outright tracing one (写真トレス) in their description or tags.
The referenced photo is sometimes displayed as a photo inset.
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