3D modding toolchain on the Windows machine: Blender, Unity, and MCP servers #1

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opened 2026-06-17 07:30:29 +00:00 by coilysiren · 0 comments

coilysiren commented

2026-06-17 07:30:29 +00:00

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Originally filed by @coilysiren on 2026-05-21T03:33:03Z

Goal - Stand up the 3D modding toolchain (Blender, Unity, and the MCP servers that drive them) entirely on the Windows gamer machine. Supersedes the toolchain half of #2.

Where everything runs

All of this runs on the Windows gamer machine, not the Mac. The Mac could technically run Blender, but that's not the setup Kai wants. Unity, Blender, and both MCP servers all land on Windows. The Windows host has known rough edges (text entry, terminal) tracked in the kai-windows-env skill - expect setup to be fiddlier there than on the Mac.

Unity MCP - research finding

The original #2 task said "install the Bezi MCP." That premise is wrong. Verified options:

Bezi (bezihq, bezi.com) - the orange/purple ghost tool. Real and well-liked, but a closed-source commercial Unity plugin with its own built-in agent, credit-billed $20-200/mo. No MCP server - MCP support is roadmap-only, and as a client (Jira/Notion/Git pull-in), not a surface Claude can drive. Can be trialed standalone, but it cannot be the Claude toolchain. ❌
CoplayDev/unity-mcp - Coplay is a company (coplay.dev). Real MCP server, open source, free, the most popular third-party Unity MCP. Bridges Claude / Cursor to the Unity Editor. ✅ Primary recommendation.
AnkleBreaker-Studio/unity-mcp-server - AnkleBreaker Studio is a company. ~268 tools, free, open source, broadest coverage (Shader Graph, terrain, NavMesh, MPPM). ✅ Strong alternative.
IvanMurzak/Unity-MCP - solo dev, not a company. Free, open source, Claude Code native. ✅ Fine, just not company-backed.
Unity's own MCP - correction to #2's "Unity released their own and it sucks." Unity ships a real MCP server now, in open beta for Unity 6+, in the com.unity.ai.assistant package (doc versions out to 2.4.0-pre.1). It connects Claude Code / Cursor / VS Code Copilot to the editor via an auto-installed relay binary, exposing tools like Unity_ManageScene, Unity_ManageGameObject, Unity_ReadConsole. It is NOT free. It needs a Unity AI subscription: Personal Edition is $10/mo (or a one-time 14-day, 1000-credit free trial). Pro / Enterprise / Industry include it. On Personal Edition this makes Unity's own MCP a paid option, unlike the three free third-party servers above.

Recommendation: CoplayDev/unity-mcp as primary - free, company-backed, Claude-native. The three third-party servers are all free. Unity's official MCP costs $10/mo on Personal Edition, so it is only a sensible fallback if Kai is already on Unity Pro. Skip Bezi for the Claude toolchain.

Unity's official MCP - setup detail (if chosen)

Requires Unity 6 (6000.0+) and the com.unity.ai.assistant package. The pinned editor 6000.2.10f1 qualifies.
The bridge auto-starts when the editor loads and installs a relay binary to ~/.unity/relay/ (Windows: %USERPROFILE%\.unity\relay\relay_win.exe --mcp).
Point Claude Code at the relay command, then approve the pending connection at Edit > Project Settings > AI > Unity MCP.

Tasks

Install Unity 6000.2.10f1 (Unity 6, per ProjectSettings/ProjectVersion.txt) on the Windows machine and open eco-mods-assets as a project. Physical action - Kai only.
Install Blender on the Windows machine. Physical action - Kai only.
Pick the Unity MCP: CoplayDev/unity-mcp (recommended, free) vs AnkleBreaker (free) vs IvanMurzak (free) vs Unity-official ($10/mo on Personal Edition). Decision - Kai.
Install and wire the Blender MCP on the Windows machine.
Install and wire the chosen Unity MCP on the Windows machine.
Register both MCPs through mcporter per the tooling-mcp-servers convention (config in agentic-os-kai), not a raw .mcp.json.

Blocked on Kai

Unity install, Blender install, and the Unity MCP vendor pick all need Kai. Once Unity + Blender are installed and the MCP is chosen, the MCP wiring and mcporter registration can be done by an agent on the Windows host.

Migrated from coilyco-bridge/eco-mods-assets#1 during the eco repo consolidation (coilysiren/inbox#100).

_Originally filed by @coilysiren on 2026-05-21T03:33:03Z_ **Goal** - Stand up the 3D modding toolchain (Blender, Unity, and the MCP servers that drive them) entirely on the Windows gamer machine. Supersedes the toolchain half of #2. ## Where everything runs All of this runs on the **Windows gamer machine**, not the Mac. The Mac could technically run Blender, but that's not the setup Kai wants. Unity, Blender, and both MCP servers all land on Windows. The Windows host has known rough edges (text entry, terminal) tracked in the `kai-windows-env` skill - expect setup to be fiddlier there than on the Mac. ## Unity MCP - research finding The original #2 task said "install the Bezi MCP." That premise is wrong. Verified options: - **Bezi** (bezihq, bezi.com) - the orange/purple ghost tool. Real and well-liked, but a closed-source commercial Unity plugin with its own built-in agent, credit-billed $20-200/mo. **No MCP server** - MCP support is roadmap-only, and as a client (Jira/Notion/Git pull-in), not a surface Claude can drive. Can be trialed standalone, but it cannot be the Claude toolchain. ❌ - **CoplayDev/unity-mcp** - Coplay is a company (coplay.dev). Real MCP server, open source, **free**, the most popular third-party Unity MCP. Bridges Claude / Cursor to the Unity Editor. ✅ Primary recommendation. - **AnkleBreaker-Studio/unity-mcp-server** - AnkleBreaker Studio is a company. ~268 tools, **free**, open source, broadest coverage (Shader Graph, terrain, NavMesh, MPPM). ✅ Strong alternative. - **IvanMurzak/Unity-MCP** - solo dev, not a company. **Free**, open source, Claude Code native. ✅ Fine, just not company-backed. - **Unity's own MCP** - correction to #2's "Unity released their own and it sucks." Unity ships a real MCP server now, in open beta for Unity 6+, in the `com.unity.ai.assistant` package (doc versions out to `2.4.0-pre.1`). It connects Claude Code / Cursor / VS Code Copilot to the editor via an auto-installed relay binary, exposing tools like `Unity_ManageScene`, `Unity_ManageGameObject`, `Unity_ReadConsole`. **It is NOT free.** It needs a Unity AI subscription: Personal Edition is **$10/mo** (or a one-time 14-day, 1000-credit free trial). Pro / Enterprise / Industry include it. On Personal Edition this makes Unity's own MCP a paid option, unlike the three free third-party servers above. **Recommendation:** CoplayDev/unity-mcp as primary - free, company-backed, Claude-native. The three third-party servers are all free. Unity's official MCP costs $10/mo on Personal Edition, so it is only a sensible fallback if Kai is already on Unity Pro. Skip Bezi for the Claude toolchain. ## Unity's official MCP - setup detail (if chosen) - Requires Unity 6 (`6000.0`+) and the `com.unity.ai.assistant` package. The pinned editor `6000.2.10f1` qualifies. - The bridge auto-starts when the editor loads and installs a relay binary to `~/.unity/relay/` (Windows: `%USERPROFILE%\.unity\relay\relay_win.exe --mcp`). - Point Claude Code at the relay command, then approve the pending connection at Edit > Project Settings > AI > Unity MCP. ## Tasks - [ ] Install Unity `6000.2.10f1` (Unity 6, per `ProjectSettings/ProjectVersion.txt`) on the Windows machine and open `eco-mods-assets` as a project. **Physical action - Kai only.** - [ ] Install Blender on the Windows machine. **Physical action - Kai only.** - [ ] Pick the Unity MCP: CoplayDev/unity-mcp (recommended, free) vs AnkleBreaker (free) vs IvanMurzak (free) vs Unity-official ($10/mo on Personal Edition). **Decision - Kai.** - [ ] Install and wire the Blender MCP on the Windows machine. - [ ] Install and wire the chosen Unity MCP on the Windows machine. - [ ] Register both MCPs through mcporter per the `tooling-mcp-servers` convention (config in `agentic-os-kai`), not a raw `.mcp.json`. ## Blocked on Kai Unity install, Blender install, and the Unity MCP vendor pick all need Kai. Once Unity + Blender are installed and the MCP is chosen, the MCP wiring and mcporter registration can be done by an agent on the Windows host. --- _Migrated from coilyco-bridge/eco-mods-assets#1 during the eco repo consolidation (coilysiren/inbox#100)._

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