"Different Worlds" Weather Child AI Controversy Cheat Sheet: Behind the VTuber's Furious Withdrawal from Commercials Is a Dilemma for Game Developers

Chinese mobile game “Yihuan” caused some VTubers and voice actors to boycott after hiding the use of AI-generated plagiarized content. This article will comprehensively organize the controversy over AI generation in “Yihuan,” which also reflects the difficulties game developers face in handling generative AI in public opinion and copyright issues.

Yihuan’s Weather Child AI Filter Controversy, a Complete Overview

At the end of April this year, Chinese developer Hotta Studio launched the open-world mobile game “Yihuan,” which surpassed 1.5 million watch hours on Twitch on its first day online. However, some players gradually discovered that the game contained materials suspected of being created with generative AI.

The trigger for the AI controversy in “Yihuan” originated from a promotional poster in the game, which closely resembles a BD/DVD bonus from Makoto Shinkai’s animated film “Weathering with You,” raising suspicion of AI filtering or AI-generated imitation. Additionally, players found a short film lasting 18 minutes within a game quest, suspected to be AI-generated, and noticed unnatural distortions in character clothing during movement obstructions.

If it were simply about inserting AI-generated content into the game, the controversy might have remained as a debate between AI supporters and opponents, but the key factor igniting community outrage is the developer’s concealment of AI use from partners and copyright disputes, which was exposed by collaborating VTubers. The use of AI-generated content itself has become a secondary issue.

Well-known VTuber Ironmouse quickly accused Hotta Studio of lying after learning about this, stating that the official had promised that the “Yihuan” mobile game would definitely not use AI generation technology, but this was not true, and the game’s commercial cooperation was immediately terminated.

Another VTuber, Shylily, also ended her game stream early, emphasizing that using AI to profit from works without creator consent is highly controversial; Meggie-Elise, who voiced “Yihuan,” also stated she does not support the use of generative AI in creative fields and demanded the official address the issue or she would cease cooperation.

Yihuan Responds to AI Controversy, Promises to Redo Controversial Materials

Faced with strong backlash, Hotta Studio issued an emergency statement admitting that AI-assisted tools were used during development, emphasizing that only a few background and environmental materials involved AI technology.

The statement pointed out that, “The core aspects of ‘Yihuan,’ such as characters and story, are entirely based on human creativity,” and specifically addressed the poster resembling “Weathering with You” and the pink cat heist scene that community questioned, stating they are being remade and related AI elements are being removed.

Image source: X/NTE Global

“Yihuan” producer Yang Lei publicly promised that the core content of the game would not involve AI technology. The latest official statement also aims to calm player anger and promises to continue listening to feedback. The player community’s reactions are mixed: some believe that as long as AI does not affect the rights of the development team, moderate use of generative AI is acceptable; others insist on boycotting games containing AI materials and criticize the lack of transparency from management beforehand.

Generative AI Becoming a Trend in Game Development, But Approaches Vary

However, the integration of generative AI into game development has become an irreversible trend in the industry. Different companies adopt different methods—some embrace AI for early development, while others directly insert AI-generated content into the game.

One camp, such as Shift Up, the developer of “Victory Goddess: Niki,” with CEO Kim Hyung-tae, believes that Korean studios must significantly improve efficiency, enabling one person to do the work of 100, relying on AI technology to compete with Chinese and American developers. As a character artist, he often shares AI-generated works on personal social media, though reactions from netizens are mixed.

The more cautious camp, like Capcom, the developer of the “Resident Evil” series, has explicitly stated that AI-generated content will not be directly incorporated into games, but AI will be used as an auxiliary tool to improve productivity. Capcom’s technical director, Abe Kazuki, revealed that the company has built a concept generation system to help art directors focus quickly, saving the effort of brainstorming hundreds of thousands of objects in large games, but final content is still created manually by humans.

Image source: Google Cloud Capcom Technical Director Abe Kazuki

“Baldur’s Gate” series developer Larian Studios also tested AI text generation technology, but lead writer Adam Smith assured that the team will never let AI handle in-game writing content. Because currently, AI-produced text quality is extremely poor—at best, a 3 out of 10, which cannot meet the quality requirements for storytelling.

However, “Kingdom Come: Deliverance” game director Daniel Vávra urged anti-AI players to face reality, because AI is already widely used in the industry. If AI can help developers free themselves from tedious tasks and focus on core creation, the benefits outweigh the drawbacks.

Related reports:
Divinity developer to use AI, sparks player backlash! Larian clarifies: no layoffs due to this

AI smell is unbearable? Larian: AI-generated text quality is terrible, won’t be used in Divinity

To say or not to say? “Yihuan” AI controversy reflects developers’ dilemma

The “Yihuan” AI controversy also highlights that game companies are in a difficult position when generative AI still faces huge controversy in entertainment art—balancing market and public opinion pressure, they face the dilemma of whether to “disclose AI use first or not.”

If they disclose first, it might trigger backlash from anti-AI communities, but it also allows players to choose whether to continue playing the game; if they don’t disclose and it’s discovered later, the anti-AI criticism could intensify, possibly damaging the game’s reputation or derailing discussions.

However, “Yihuan” chose a third path—claiming publicly and to partners that they do not use AI, while actually doing so (and suspectedly using AI to generate “Weathering with You” images). Looking at the outcome, this was a poor decision. It would have been better to be honest from the start to preserve the company’s integrity.

Further reading:
Grace faces AI face swap? Nvidia DLSS 5 uses “Resident Evil 9” to showcase, drawing heavy criticism from players and support from tech experts