Fix: StaticMeshActor visibility and WSL2 connectivity #34
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CORE FIXES ONLY: 1. StaticMeshActors now have mesh set (were invisible before) 2. Server binds to 0.0.0.0 instead of 127.0.0.1 (enables WSL2) 3. Python host/port configurable via env vars These are minimal, essential changes that fix broken functionality.
- StartUnrealWithMCP.bat for easy Windows launch with correct flags - mcp-wsl2-example.json as reference configuration - Clear documentation on when/why to use -UnrealMCPBind=0.0.0.0 - start_mcp.sh helper for WSL2 users Documentation only - no code changes.
- Added screenshot capability to Editor Control features list - Added Example MCP Usage section with natural language examples - Clarified that actors now appear with meshes (fixing previous bug) - Documented that screenshots use Unreal's built-in tool
- Use environment variables with defaults instead of hardcoded IP - Default to localhost (127.0.0.1) if UNREAL_HOST not set - Add helpful echo messages showing connection target - Make script more portable by using relative paths
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Summary
Critical Fixes
1. StaticMeshActor Visibility Bug
Problem: When spawning StaticMeshActors, they were invisible because no mesh was being set.
Solution: Added mesh loading logic in
HandleSpawnActorto properly assign static meshes to actors.2. WSL2 Network Connectivity
Problem: WSL2 couldn't connect to Unreal Engine because the server was binding to 127.0.0.1.
Solution: Changed binding from localhost to 0.0.0.0 to accept connections from all interfaces.
3. Screenshot Tool
Added: New
take_screenshotMCP tool that uses Unreal's built-in viewport capture.Changes Made
C++ Plugin (
UnrealMCPBridge.cpp)MCP_SERVER_HOSTfrom "127.0.0.1" to "0.0.0.0"Actor Commands (
UnrealMCPEditorCommands.cpp)Python MCP Server
take_screenshottool with full parametersstatic_meshparameter tospawn_actorDocumentation
Test Plan
Breaking Changes
None - all changes are backward compatible.
🤖 Generated with Claude Code
Co-Authored-By: Claude noreply@anthropic.com