IMVU, and Active Worlds. Some evidence suggests that avatars that are more anthropomorphic are perceived to be less credible and likeable than images that are less anthropomorphic. Social scientists at Stanford's Virtual Human Interaction Lab examine the implications, possibilities, and transformed social interaction that occur when people interact via avatars. Social media Another use of the avatar has emerged with the widespread use of social media platforms. There is a practice in social media sites: uploading avatars in place of real profile image. Profile picture is a distinct graphics that represent the identity of profile holder. It is usually the portrait of an individual, logo of an organization, organizational building or distinctive character of book, cover page etc. Using avatars as profile pictures can increase users' perceived level of social presence which in turn fosters reciprocity and sharing behavior in online environments. According to MIT professor Sherry Turkle: "...we think we will be presenting ourselves, but our profile ends up as somebody else – often the fantasy of who we want to be". Motion capture Another form of use for avatars is for video chats/calls. Some services, such as Skype (through some external plugins) allow users to use talking avatars during video calls, replacing the image from the user's camera with an animated, talking avatar. Through the use of facial motion capture and a webcam, an avatar can be configured to mimic the motions and expressions of the user. This can be integrated directly into games, such as Star Citizen, and via standalone software such as FaceRig. Virtual YouTubers use animated avatars designed in software such as Live2D, which often resemble anime characters. A whole ecosystem of talent agencies and investors exists to manage these online personalities, which often differ from the creator's real-life persona. YouTube's 2020 Culture and Trends report highlighted VTubers as one of the notable trends of that year, with 1.5 billion views per month by October, and in May 2021, Twitch added a VTuber tag for streams as part of a wider expansion of its tag system. In popular culture Cartoons and stories sometimes have a character based on their creator, either a fictionalised version (e.g. the Matt Groening character in some episodes of The Simpsons) or an entirely fictional character (e.g. Hermione Granger in the Harry Potter series has been said by J. K. Rowling to be based upon herself). Such characters are sometimes known