Spline V2 ships Agent Mode and MCP support for 3D editing

• V2 lets AI agents generate or edit 3D scenes inside the editor, then keeps the resulting scene editable, as the Agent Mode demo shows.
• The desktop app now exposes a Spline MCP connection that can link an agent from any provider to scene creation and editing, according to the MCP announcement.
• Scenes can carry HTML and JavaScript for UI-driven work, games, and custom interactions, as the custom code demo demonstrates.
• A new WebGPU engine adds PBR materials, HDR environment maps, tone mapping, and a physical sky, while the engine announcement says exported runtimes shrink around the content they contain.
• Spline says V2 is ready to explore now in the availability post.

Spline's official homepage describes the product as a browser-based platform for collaborative, interactive experiences. The Agent Mode demo makes V2's central promise concrete: a creator can return to Edit mode after an agent has built a scene. The engine announcement carries an unusually practical web-production detail, an export runtime that adapts its size to the scene.

Spline says agents generate or edit scenes within the editor, with Edit and Preview available as separate modes. Generated scenes remain editable, leaving geometry, materials, and interactions in the working file rather than flattening the result into a render.

The new MCP connection lives with the desktop app and is meant to connect Spline to an agent from any provider. Spline's stated scope is direct scene creation and editing.

The new code surface is aimed at three kinds of work:

• UI-driven scenes
• Games
• Custom interactions

Spline's Code documentation says a file can carry HTML, CSS, and JavaScript alongside the 3D canvas, authored in a Code tab next to Edit and Preview. Its injected spline API can read and write variables, create or move objects, read mesh geometry, and supply custom Three.js materials.

For handoff beyond the editor, the export documentation lists Vanilla JS, Three.js, React, Next.js, and react-three-fiber code exports.

Spline's rebuilt engine adds:

• PBR materials
• HDR environment maps
• Tone mapping
• A physical sky
• Dust and cavity material layers
• Decals

The same announcement says the runtime is smaller than before and sizes itself to the content being exported.

The desktop app revamp adds a tab bar, performance work, and the MCP connectors. V2 is now available to explore, the availability post says.

In a support reply, Spline said the product remains primarily web-based, creators can bring their own models or start from scratch, and video export is possible.