{"schema":"record/v1","id":"art_01M5MBYEMG7BDS4PMXHJ9B4GKT","type":"article","revision":1,"etag":"\"r1.s0\"","title":"Where does the shared state of a multiplayer world model live, and what are the basic design families the primary papers use to keep several players consistent?","summary":"The eight papers fall into four placements of the shared state: inside one joint network (Solaris, MIRA, Gamma-World, ShareVerse) coupled by attention over all views or via hub tokens; in an explicit global state encoder (MultiWorld); in an explicit typed state with separate renderers (MASS); or exchanged between per-player clients as player and scene state (WorldCast). MetaWorld couples two denoising branches by cross-attention at every layer. Which design is better is not settled: papers compare only against their own retrained baselines.","status":"active","body":{"text":"The eight papers fall into four placements of the shared state: inside one joint network (Solaris, MIRA, Gamma-World, ShareVerse) coupled by attention over all views or via hub tokens; in an explicit global state encoder (MultiWorld); in an explicit typed state with separate renderers (MASS); or exchanged between per-player clients as player and scene state (WorldCast). MetaWorld couples two denoising branches by cross-attention at every layer. Which design is better is not settled: papers compare only against their own retrained baselines.\n\nCurator qualifications: All excerpts located; four shared-state placements; cost-driver disagreement (attention vs rendering) kept.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://arxiv.org/html/2602.22208v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/pdf/2607.05352v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2605.28816v1","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2604.18564v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2608.06257v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2610.12412v1","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2603.02697v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2606.02753v1","note":"candidate evidence excerpts"}]},"categories":["T15","T18"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://arxiv.org/html/2602.22208v2","claim":"The eight papers fall into four placements of the shared state: inside one joint network (Solaris, MIRA, Gamma-World, ShareVerse) coupled by attention over all views or via hub tokens; in an explicit global state encoder (MultiWorld); in an explicit typed state with separate renderers (MASS); or exchanged between per-player clients as player and scene state (WorldCast). MetaWorld couples two denoising branches by cross-attention at every layer. 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MetaWorld couples two denoising branches by cross-attention at every layer. Which design is better is not settled: papers compare only against their own retrained baselines.\n\nCurator qualifications: All excerpts located; four shared-state placements; cost-driver disagreement (attention vs rendering) kept.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://arxiv.org/html/2602.22208v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/pdf/2607.05352v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2605.28816v1","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2604.18564v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2608.06257v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2610.12412v1","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2603.02697v2","note":"candidate evidence excerpts"},{"url":"https://arxiv.org/html/2606.02753v1","note":"candidate evidence excerpts"}]},"tags":[],"type":"article","links":[],"title":"Where does the shared state of a multiplayer world model live, and what are the basic design families the primary papers use to keep several players consistent?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"The eight papers fall into four placements of the shared state: inside one joint network (Solaris, MIRA, Gamma-World, ShareVerse) coupled by attention over all views or via hub tokens; in an explicit global state encoder (MultiWorld); in an explicit typed state with separate renderers (MASS); or exchanged between per-player clients as player and scene state (WorldCast). 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