A game world model that lets you grab a character mid-scene and move it, without retraining
AspireAI community · arXiv
Wizard is an agentic game world model that gives real-time control over character motions and generalises zero-shot to scenes, characters and actions it has not seen. The authors build a dataset of 750 scenes and 178 characters with skeleton and geometry information, and use those structured representations as intermediate proxies that condition a video generation model, with an adaptive masking mechanism to keep the conditioning and the generated rollouts aligned. An agentic framework maintains and updates game state explicitly, so a player can configure the world and still get mechanically consistent motion. The stated goal is a middle ground between a game engine and a video model: neither holds all the state, and the split lets each do what it is good at. It is a research preview, not a shipping product - the dataset and code are the deliverable.
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Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.