Frequently Asked Questions
Frequently Asked Questions
How much does the AI cost? Is there a free option?
The plugin itself is a one-time purchase on FAB. No subscriptions, no credits, no monthly fees.
For AI usage, you’ve got several options:
- Free built-in AI — two free-tier slots that use real models. No API key required, works immediately after activation. See Free Tier.
- Free API keys — Google Gemini offers free API keys with generous limits. Get one from Google AI Studio.
- Paid API keys — bring your own OpenAI, Claude, DeepSeek, OpenRouter, or any OpenAI-compatible endpoint. You pay the provider directly — typically a few cents per conversation.
- AI agents — run Claude Code, Codex, GitHub Copilot, Gemini CLI, Cursor, Cline, and 30+ others directly inside the editor. Each agent uses its own pricing (some come with subscriptions you may already have).
- Local LLMs — run entirely on your machine with zero internet, totally free. Works with Ollama, LM Studio, Lemonade. See Local LLM Setup.
Is my code sent to external servers? Can I keep everything private?
You have full control:
- Cloud API providers (Google / OpenAI / Claude / DeepSeek): your prompts and context are sent to the AI provider for processing — standard for all AI tools.
- Local LLMs: everything stays on your machine. Zero data sent anywhere. Perfect for sensitive or NDA projects.
- AI agents: data flows through the agent’s own API with its own privacy policy.
- Free tier: prompts route through BlueprintsLab proxy servers to the AI provider. Nothing is stored on the proxy beyond what’s needed for the request.
How does this compare to other AI plugins for Unreal Engine?
Scope. Other plugins handle a handful of tasks. Ultimate Engine Co-Pilot covers 56 tool categories with 1000+ actions — Blueprint generation, animation, materials, Niagara VFX, PCG, behavior trees, GAS, UMG widgets, sequencer, and more. Plus AI asset generation (textures, PBR materials, 3D models, sounds), 35+ CLI agents you can run inside the editor, a learning ecosystem, 13 UI languages, and full C++ source. One-time payment.
Is this just for beginners? Or can experienced developers use it too?
Both. For beginners, it’s a learning tool with built-in courses, video tutorials, and a skill tree that teaches Unreal Engine fundamentals. For experienced developers, it’s a productivity multiplier — generate gameplay systems in minutes, scaffold UI layouts from a description, build cinematics with camera rigs, create PCG scatter systems, and automate repetitive setup work.
Do I need to know C++ to use this?
Not at all. The primary way to use the plugin is plain English (or your native language — 20 supported in the UI). The C++ tools are entirely optional and aimed at advanced users. The included source code is for transparency and modification — you don’t need to touch it to use the plugin.
Does this work in languages other than English?
Yes. The plugin UI is translated into 20 languages. You can also write prompts in your own language and the AI will generate the right Blueprint logic, materials, animations, etc. See Supported Languages.
What AI providers are supported?
Cloud: OpenAI (GPT-4, GPT-4o, o1, o3), Claude (Sonnet, Opus, Haiku), Google Gemini (Flash, Pro), DeepSeek, and any model via OpenRouter.
Agents: 35+ via the Zed ACP registry — Claude Code, Codex, GitHub Copilot, Gemini CLI, Cursor, Cline, Auggie, OpenCode, Goose, Kimi, Qwen, GLM, and more.
Local: any OpenAI-compatible local server (Ollama, LM Studio, Lemonade, vLLM, LocalAI, Jan).
Custom: any endpoint that accepts the OpenAI chat completions format.
Free: two built-in free-tier slots, no API key needed.
What Unreal Engine versions are supported?
UE 5.4, 5.5, 5.6, and 5.7. Windows, macOS, and Linux. Editor only — this is a development tool, not a runtime plugin.
What’s the update and support policy?
Lifetime updates included. Your one-time purchase grants access to all future features and engine version support. AI prompt files and tool documentation update automatically from the cloud — no new plugin download needed.
For support: join our Discord community, or use the built-in Report button in the Architect view to send bug reports directly to us (with optional image attachments).
Can I use this with my existing projects?
Yes. The plugin works with any UE 5.4+ project. No migration or special setup required. Just install, restart the editor, and open the plugin from the Window menu.
What’s included in the C++ source?
Full source code for the entire plugin. Every tool, every manager, every UI component. Modify it, extend it, or just learn from it. The source is included for transparency — you don’t need to touch it to use the plugin.
Can I use this with MCP / Claude Desktop / external tools?
Yes. The plugin runs an HTTP MCP server on port 30000 (with a broker on 9876 for routing across multiple open editors). Claude Desktop, Claude Code, Cursor, Cline, Codex, and any other MCP-compatible client can connect and use all the plugin’s tools. See MCP Integration.
What happens when I hit the free tier token limit?
Requests are rejected until the reset timer expires (24 hours for Slot 1, 6 hours for Slot 2). You can switch to the other slot, use a free Gemini API key, or bring your own API key for unlimited usage. See Free Tier.
Can I transfer my license to another machine?
Your license works on machines linked to your FAB / Epic account. There are no arbitrary device limits — the plugin validates your purchase through FAB’s standard licensing. If you switch machines, just install and activate on the new one.
What are the system requirements?
The plugin runs wherever UE 5.4+ runs. No special hardware beyond what Unreal Editor itself needs. For local LLMs you’ll want a GPU with enough VRAM for the model you’re loading (8GB+ for 7B models, 16GB+ for 13B and up).
Where is plugin data stored?
| Data | Location |
|---|---|
| Project settings | {ProjectDir}/Saved/Config/ (ini files) |
| Conversation history | {ProjectDir}/Saved/BpGeneratorUltimate/ |
| AI Memory | {ProjectDir}/Saved/BpGeneratorUltimate/ai_memory.json |
| GDD files | {ProjectDir}/Saved/BpGeneratorUltimate/gdd/ |
| Project scan index | {ProjectDir}/Saved/AI/ProjectIndex.json |
| Exported conversations | {ProjectDir}/Saved/Exported Conversations/ |
| License token + global settings | Windows: %LOCALAPPDATA%/UltimateCoPilot/ • macOS: ~/Library/Application Support/UltimateCoPilot/ • Linux: ~/.config/UltimateCoPilot/ |
When should I use AI agents vs API keys?
| Use case | Recommendation |
|---|---|
| Quick one-off tasks | API key or free tier — faster startup, no CLI to install |
| Complex multi-step generation | AI agent — agents reason more deeply and chain tools better |
| Maximum speed | API key with a fast model (Gemini Flash, GPT-4o-mini) |
| Best reasoning quality | Claude Code or Codex with high effort |
| Budget-conscious | Free tier, or Google Gemini free API key |
| Complete privacy | Local LLM (Ollama, LM Studio) |
| No internet | Local LLM |
I have an idea for a feature! Are you open to suggestions?
Absolutely. Join the Discord and share your ideas. The best features often come from user suggestions.