blender-pipeline-automation
Automate Blender 5.2 at scale - headless CLI flags, batch convert/inventory/run-any-skill-script over folders of .blend/.fbx/.glb/.obj/.usd, sharding, bpy pip module, library linking, path management, render-farm and CI patterns. Use for batch jobs, format conversion, library maintenance and pipeline tooling.
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- 81
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- #9192
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/el4cteo/blender-skills --skill blender-pipeline-automation- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads blender-pipeline-automation automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Pipeline Automation
The execution model is in blender-core (run_in_blender.py finds Blender and prints only the JSON results).
Batch one-liners
blender -b -P scripts/batch_process.py -- --in "assets/**/*.fbx" --op convert --to glb --out export/
blender -b -P scripts/batch_process.py -- --in library/ --op report # inventory JSON lines
blender -b -P scripts/batch_process.py -- --in "src/*.blend" --op script \
--script ../blender-asset-qa/scripts/qa_check.py --kwargs '{"profile":"game"}' # QA a whole library
blender -b -P scripts/batch_process.py -- --in src/ --op script --script ../blender-game-optimization/scripts/make_lods.py \
--kwargs '{"rename":true}' --save-to processed/ # LODs for every file
Each file is streamed as one JSON line with ok, timing and results. Failures don't stop the batch, and the summary lists them. Parallel: start N processes with --shard 0/N … --shard N-1/N (Blender uses one core for Python, so processes scale with CPU/GPU count).
Headless CLI essentials
| Flag | Meaning |
|---|---|
-b | background, no UI. Put it first |
file.blend | open before running scripts. Order matters: args run left to right |
-P script.py / --python-expr "..." | run Python |
--python-exit-code 1 | non-zero exit if the script raises (CI) |
--factory-startup | ignore user prefs/add-ons (reproducible). Bundled add-ons still load |
--addons rigify,io_scene_fbx | enable specific add-ons |
-E CYCLES -o //out/#### -F PNG -s 1 -e 10 -a / -f 5 | render (blender-rendering) |
--command extension build/validate/install-file | extension tooling (blender-addon-development) |
-- --my args | everything after -- goes to the script (sys.argv[sys.argv.index("--")+1:]) |
--log "*", --debug-python | debugging. 5.0 changed the log format, so don't regex progress lines |
Environment variables: BLENDER_USER_SCRIPTS, BLENDER_USER_EXTENSIONS, BLENDER_SYSTEM_PYTHON. Use OCIO for custom color configs. |
bpy as a Python module
pip install bpy==5.2.* (Python 3.13, matching the Blender release) gives import bpy in plain Python, which is handy for pytest/CI/web services. It has no UI and no GPU module by default, and it's large (~300 MB). Version-lock it with the Blender you target. The bpy wheel and the CLI behave the same for data API work.
Library patterns
- Append/link:
bpy.data.libraries.load(path, link=...)(seeblender-core/references/bpy-patterns.md). 5.2:data_from.librariesexposes nested library paths when loading. - Write a subset:
bpy.data.libraries.write(path, {datablocks}, fake_user=True, path_remap="RELATIVE_ALL")builds asset/library files from a session. - Find files:
bpy.data.file_path_foreach(...)(5.2 flags:EXPAND_TOKENSfor UDIMs,EXPAND_SEQUENCES,EXPAND_CACHES), andbpy.utils.blend_paths(absolute=True)lists every external path. - Remap/relocate:
bpy.ops.file.find_missing_files(directory=...),make_paths_relative,pack_all. Libraries:lib.filepath = new; lib.reload(). - Iterate every ID:
bpy.data.all_ids(5.2), andbpy.data.orphans_purge(do_recursive=True)for cleanup.
Robustness rules
- One task per process where possible. Long Blender sessions leak (images, undo).
batch_process.pyreuses the process but resets withread_factory_settings(use_empty=True)/open_mainfile. - Never write into the source folder by default. Use separate
--out/--save-to, and write withcopy=True. - Make scripts idempotent: re-running replaces their own outputs (named prefixes,
exist_ok). - Log JSON, not prose: one object per file/job, so agents and CI can parse it cheaply.
- Pin the Blender version (5.2 LTS) for a project. Record
bpy.app.version_string+ hash (bpy.app.build_hash) in the outputs. - Paths:
bpy.path.abspath("//x")is relative to the opened .blend. In headless batches use absolute paths, or set them afteropen_mainfile. - GPU in containers: Cycles CUDA/OptiX needs the NVIDIA container runtime. Otherwise use CPU. EEVEE needs a GPU/EGL even headless.
CI recipe (GitHub Actions)
Download the Linux tarball (https://download.blender.org/release/Blender5.2/blender-5.2.2-linux-x64.tar.xz), cache it, then blender -b --factory-startup --python-exit-code 1 -P tests/run_all.py. This repo's .github/workflows/ci.yml is a working example.
FAQ
What does the blender-pipeline-automation skill do?
Automate Blender 5.2 at scale - headless CLI flags, batch convert/inventory/run-any-skill-script over folders of .blend/.fbx/.glb/.obj/.usd, sharding, bpy pip module, library linking, path management, render-farm and CI patterns. Use for batch jobs, format conversion, library maintenance and pipeline tooling.
How do I install blender-pipeline-automation?
Run npx skills add https://github.com/el4cteo/blender-skills --skill blender-pipeline-automation in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/blender-pipeline-automation/ (personal) or .claude/skills/blender-pipeline-automation/ (project).
Which AI agents can use blender-pipeline-automation?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is blender-pipeline-automation safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains blender-pipeline-automation?
It is published by el4cteo in el4cteo/blender-skills. It has 81 recorded installs.
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