Engineering blog and AI agent skills from Tinqs Studio — an agent harness for game development. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
5.3 KiB
Skill: 3D Model Generation with Tripo Studio
Generate 3D models from text descriptions or 2D images using Tripo Studio. This skill covers the workflow for game-ready 3D assets.
Overview
Tripo Studio is a web-based text-to-3D and image-to-3D tool. You describe a character, prop, or environment piece --- or upload concept art --- and Tripo generates a textured 3D model in ~60 seconds.
Output: GLB or FBX with full PBR textures (basecolour, normal, ORM/metallic/roughness).
Cost: ~25-50 credits per generation. Free tier: 150 credits/month.
When to Use
- You have approved 2D concept art and need a 3D model
- You need a quick 3D prototype from a text description
- You're generating props, characters, or environment pieces for a game
- You need multiple variants of the same object
Workflow
Text-to-3D
- Open Tripo Studio
- Click Create -> Text to 3D
- Enter your prompt (see prompt tips below)
- Settings:
- Quality: Ultra
- Model: v3.1 Best Quality (or latest)
- Texture: ON (critical --- generates PBR maps)
- Click Generate (~35-50 credits, ~60s)
- Review the model in the 3D viewer --- rotate, check materials
- Export as GLB (preferred) or FBX
Image-to-3D
- Upload your approved concept art (front view, T-pose for characters)
- Settings: same as text-to-3D
- Generate
- Review --- check if the back and sides match your expectations
- Export
Prompt Tips for Game Assets
Characters
Full body character, T-pose, front facing. Young Polynesian woman wearing
woven pandanus skirt and tapa cloth top. Shell necklace, flower in hair.
Stylized game character, not photorealistic. Clean topology.
Key rules:
- Always specify T-pose for characters (needed for rigging)
- Mention clean topology to reduce mesh artifacts
- Describe clothing and accessories explicitly
- Specify art style (stylized, realistic, low-poly, etc.)
Props
Carved wooden fishing spear with bone tip. Wrapped handle with
woven cord. Polynesian style, game prop, stylized.
Environment pieces
Thatched-roof hut on wooden stilts. Open sides with woven wall panels.
Polynesian longhouse style. Game-ready, stylized 3D.
Post-Generation Tools
Tripo offers several refinement tools after generation:
| Tool | Purpose | When to Use |
|---|---|---|
| Segment | Split model into parts | Characters with large hair (split hair from body for rigging) |
| Retopo | Retopologize mesh | When face count is too high or topology is bad |
| Texture | Regenerate textures | When colours don't match concept art |
| Animate | Add basic animations | Quick previews (not production quality) |
| Edit | Modify the model | Remove artifacts, adjust proportions |
Export Options
| Format | Use |
|---|---|
| GLB | Preferred. Single file, preserves PBR textures, works everywhere |
| FBX | When your pipeline requires it (Unity, some Blender workflows) |
| OBJ | Legacy. Loses PBR data. Avoid. |
| USD | For USD-based pipelines |
| STL | 3D printing only. No textures. |
Polygon Budget
Tripo outputs ~1.5M faces by default. You'll need to decimate:
| LOD | Target Faces | Method |
|---|---|---|
| LOD0 | 25,000 | Blender Decimate modifier or CLI |
| LOD1 | 10,000 | Same |
| LOD2 | 2,500 | Same |
Use Tripo's built-in Retopo tool for a quick reduction, or decimate in Blender for more control.
The Large Hair Problem
Auto-riggers (Mixamo, Godot's skeleton system) break when character meshes include large or complex hairstyles. The rig misidentifies the hair volume as part of the body.
Solution:
- After generation, use Tripo's Segment tool
- Select the hair and split it from the body
- Export the body-only mesh for rigging
- Export hair separately
- Reattach hair after rigging in Blender or your engine
Flag this in your handoff document for every character with big hair.
Batch Generation
When generating multiple assets in one session:
- Prepare all prompts upfront
- Generate in priority order
- Use the 3 free retries per generation before spending more credits
- Score and review each model immediately
- Track remaining credits
- Export approved models right away --- don't leave them only in the cloud
Credit Optimisation
| Action | Credits |
|---|---|
| Standard quality generation | ~15-25 |
| Ultra quality generation | ~35-50 |
| Retopo | ~10-15 |
| Texture regeneration | ~10 |
| Segment | ~5 |
Tip: Start with Standard quality for exploration, switch to Ultra only for final approved designs.
Common Mistakes
| Problem | Fix |
|---|---|
| Model has no textures | Ensure Texture is ON before generating |
| Back of character looks wrong | Use image-to-3D with front AND back views, or add "detailed back view" to prompt |
| Mesh has floating geometry | Use Edit tool to clean up, or regenerate |
| Merged fingers | Common artifact. Regenerate or fix in Blender |
| Too many polygons for game use | Use Retopo tool or Blender Decimate |
| Hair breaks auto-rigger | Segment hair from body, rig body-only |
Related Skills
- Image Generation --- create 2D concept art to feed into Tripo
- Concept Art Pipeline --- full 2D-to-3D workflow