Layer by Layer: A Technical Blueprint for a Genuinely Interoperable Metaverse
Architects of physical infrastructure understand that a building's durability is determined not by its facade but by the integrity of every structural layer beneath it—foundation, framing, mechanical systems, envelope. The metaverse, as an infrastructure project, demands the same discipline. Discussions about open standards have too often remained at the level of principle, producing aspirational language without actionable specification. What follows is an attempt to move from aspiration to architecture: a layered technical framework describing what genuine interoperability would require, at each level of the stack, to function at the scale the metaverse's ambitions demand.
The Case for a Layered Model
The networking world's adoption of the OSI model—and the practical TCP/IP stack that operationalized it—offers the most instructive precedent. By separating concerns into discrete layers with defined interfaces between them, the internet enabled radical diversity at every level while preserving the interoperability that made the whole system valuable. A browser running on a MacBook in Chicago and a terminal running on a Linux server in a data center in Virginia can exchange data reliably because the layers beneath them honor their contracts with one another.
The metaverse stack requires an analogous decomposition. Five functional layers can be identified, each with distinct technical requirements and governance considerations: identity, asset ownership, spatial representation, interaction protocol, and commerce. Conflating these layers—as most current platform architectures do—is the primary reason interoperability remains elusive.
Layer One: Identity
Identity is the foundation. Without a portable, verifiable, user-controlled identity layer, every other form of interoperability is contingent on platform permission rather than user right.
The technical specification for this layer should build on the W3C Decentralized Identifiers (DID) core specification, but with mandatory cross-method resolution requirements that the base specification leaves optional. Specifically, a conformant metaverse identity implementation should be required to support at minimum two DID methods—one anchored to a public blockchain and one operating as a web-based method—and to resolve documents from both without user intervention.
Verifiable Credentials (VCs), also a W3C specification, should govern the attachment of claims to identities: platform memberships, purchase histories, age verifications, creator credentials. The governance model for this layer should be operated as a public utility, analogous to the domain name system, with oversight distributed across a multi-stakeholder body rather than controlled by any single commercial entity. The Internet Corporation for Assigned Names and Numbers (ICANN) provides an imperfect but instructive model for what such governance can look like in practice.
Layer Two: Asset Ownership
Digital asset ownership requires a representation layer capable of encoding not just the asset itself but the rights associated with it—who may use it, under what conditions, and in which environments. Current NFT implementations address provenance without adequately addressing rights, and most platform-native asset systems address neither portability nor rights in any meaningful way.
A practical specification for this layer should define a standardized Asset Rights Manifest: a machine-readable document, cryptographically signed by the issuing creator or platform, that travels with the asset across environments and specifies usage permissions in structured, enforceable terms. The Creative Commons Rights Expression Language (ccREL) provides a partial foundation; extensions specific to spatial and interactive digital goods would be required.
Asset format standards should mandate glTF 2.0 as a baseline for 3D objects, with required support for the KHR_materials_variants extension to accommodate platform-specific rendering without forking the asset itself. Physics behavior should be encoded as a separate, optional manifest layer rather than baked into geometry, allowing destination platforms to apply their own simulation systems without corrupting the asset's visual representation.
Layer Three: Spatial Representation
The spatial layer governs how environments are described, transmitted, and rendered across different runtime systems. This is the layer at which the greatest technical divergence currently exists among platforms, and consequently where the interoperability cost is highest for creators.
A conformant spatial representation standard should define a Scene Description Format (SDF) that encodes environment geometry, lighting intent, audio zones, interaction boundaries, and occupancy rules in a platform-agnostic way. USD (Universal Scene Description), originally developed by Pixar and now maintained as an open-source project, provides the most mature foundation available and should be adopted as the mandatory baseline, with a defined metaverse profile that specifies which USD features are required versus optional.
Critically, the SDF should separate lighting intent from lighting implementation. A creator should be able to specify that a space is meant to feel like late-afternoon indirect sunlight without specifying the exact rendering algorithm that produces it. Destination platforms retain freedom to implement the intent within their own rendering pipelines while being held accountable for honoring the intent itself.
Layer Four: Interaction Protocol
Interaction is where spatial experiences become social ones, and it is the layer most frequently overlooked in interoperability discussions. How avatars communicate presence, gesture, proximity, and voice to one another across platform boundaries requires a dedicated protocol specification.
A metaverse interaction protocol should define a minimal avatar state schema—position, orientation, a bounded set of semantic gesture states, and voice activity—that any conformant platform must be capable of transmitting and receiving. This schema should be extensible, allowing platforms to transmit richer state information to peers that can interpret it, while guaranteeing that a receiving platform incapable of interpreting extended state degrades gracefully rather than failing entirely.
The WebRTC standard provides a model for real-time data channel management that could underpin this layer's transport requirements. Governance of the interaction protocol layer should be handled by an open working group with mandatory representation from accessibility advocates, given the direct impact of interaction design on users with disabilities.
Layer Five: Commerce
The commerce layer sits atop the stack and is the layer most directly exposed to regulatory and legal complexity. A genuinely interoperable commerce system must address transaction settlement, tax jurisdiction, consumer protection, and dispute resolution across environments that may be operated by entities in different legal jurisdictions.
At the technical level, a cross-platform commerce specification should define a standardized Transaction Receipt format—cryptographically signed, human-readable, and machine-parseable—that constitutes evidence of purchase independent of any single platform's continued operation. This receipt should reference the Asset Rights Manifest from Layer Two, creating an auditable chain from purchase to permitted use.
Governance of the commerce layer requires collaboration between the technical standards community and regulatory bodies. The Federal Trade Commission's existing frameworks for digital goods and the Consumer Financial Protection Bureau's jurisdiction over payment systems both have relevance here, and standards bodies should engage proactively rather than waiting for regulatory mandates.
Governance Across Layers
No single organization should govern all five layers. The identity layer warrants a public utility model. The asset and spatial layers are appropriate for a multi-stakeholder technical consortium with open membership. The interaction protocol layer benefits from a working group structure with built-in civil society representation. The commerce layer requires formal regulatory engagement.
This distributed governance model is not a weakness—it is a feature. Single-organization control of the full stack is precisely the condition that produces the closed ecosystems the open metaverse is meant to supersede. Distributing governance distributes the power to capture it.
Building this architecture will take years and will require sustained commitment from platform operators, device manufacturers, standards bodies, and regulators. The alternative—allowing the stack to calcify around the proprietary choices of today's largest platforms—will cost far more, measured in both economic opportunity and user autonomy, than the investment required to build it right.