{
  "id": 11067934,
  "title": "After Removing the Background, the Characters Became Semi-Transparent Too",
  "url": "https://urgent.news/2026/10/01/after-removing-the-background-the-characters-became-semi-transparent",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-10-01T00:36:17.000Z",
  "source": {
    "name": "Dev.to",
    "slug": "dev-to",
    "url": "https://dev.to/orca_forge/after-removing-the-background-the-characters-became-semi-transparent-too-2ann"
  },
  "original_language": "en",
  "account": "In the course of debugging a character misalignment issue, the researcher observed that characters in the lip-sync videos became semi-transparent when the background was removed. This was noticeable in areas with skin tones and subtle gray elements, such as Aibu's head, Dario's stubble, and the character's shirt fabric. The transparency occurred because certain colors within the character were close to the background color. The colorkey threshold value was set at 0.17 for determining background similarity, and 0.08 for smoothing the boundary. Characters with lighter colorations were more affected by this threshold. The researcher found that a narrower threshold could result in too much character extraction, while a wider threshold led to background residue. They conducted tests with different threshold values and concluded that 0.17 provided the best balance between removing the background and retaining the characters. To ensure transparency was visible, they recommended overlaying semi-transparent areas against a background of a different color.",
  "summary": "📝 Originally published (in Japanese) at forge.workstyle.tech . I was investigating a bug where the face and jaw were misaligned. While zooming in on the areas before and after the boundary and lining them up, I noticed something else. Eve's head was slightly transparent. You could see the background bleeding through just a bit. The same was true for the grey shirt. Even Dario's stubble had…",
  "key_points": [
    "Characters became semi-transparent when background removed",
    "Transparency due to colors close to background color",
    "Threshold 0.17 provided best balance between removal and retention"
  ],
  "editors_take": "The observed semi-transparency in characters with certain colorations means a balance must be struck in setting the colorkey threshold to avoid either losing character detail or leaving behind background residue.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}