JavaScript snippet to modify your Roblox profile picture outside the normal parameters.

RobloxProfilePicture.js

$.ajax({
  method: "POST",
  url: "https://avatar.roblox.com/v1/avatar/thumbnail-customization",
  contentType: "application/json",
  data: JSON.stringify({
    "camera": {
        // Ranges are inclusive.
        "distanceScale": 1, // 0.5 to 4 (Must be 1 for FullBody)
        "fieldOfViewDeg": 45, // 15 to 45
        "yRotDeg": 0 // -60 to 60
    },

    // these can both be 0 for no animation, but only 1 can be non-zero
    "idleAnimationAssetId": 0, // idle animation asset id
    "emoteAssetId": 14024722653, // emote asset id


    // 1 = Closeup (headshot), 2 = FullBody (bodyshot). 
    // Closeup and FullBody can have different configurations.
    "thumbnailType": 1 
  })
});

location.reload();