MCP server for agent-authored 3D geo scenes: write SSDL, render on a real WebGPU engine, read the frame back.
View on GitHub ↗Homepage ↗Agents can't see what they render. SSWorld closes the loop.
An MCP server that lets any MCP-capable agent app (Claude Code, Codex, Hermes, Cursor …) author, compile, render and inspect 3D geographic scenes — written in SSDL, a QML-like scene description language — on the SSEngine WebGPU runtime. The picture above is a scene an agent wrote; the 42 KB of Python that generates it is in examples/SkylineBoulevard.
- A real engine, not a preview. Deferred rendering, atmospheric sky, shadows, post-processing, glTF assets, GPU instancing, geographic anchoring. Scenes run at 60 fps with hundreds of thousands of instanced objects. - The agent gets the frame back. ssworldcaptureframe renders through the engine and returns luma percentiles, exposure tails, colour coverage per 3×3 region, top colours, the camera pose it actually used and the deviation from the one requested — plus a receipt binding the frame to the source digest and the answering page. An agent can tell that its sky came out orange-brown, and fix it, without a human looking. - Traps that cost a real session become compile errors. Every failure below was first hit on real hardware, where it showed up as a blank page with nothing in the log. Each one now names the node and the member at compile time: a sky tinted through rayleighScattering, a Lathe radius of 0, a normalMap on geometry without tangents, a heights list counted as cells instead of corners.
From the project README.
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