Agent Skills
› EL4CTEO/blender-skills
› blender-lighting-lookdev
blender-lighting-lookdev
GitHubBlender 5.3 灯光与材质预览技能，提供布光、相机构图及场景搭建方案。用于资产展示、渲染前检查材质效果及统一光照环境下的视觉评估。
Trigger Scenarios
需要为 3D 资产设置标准展示灯光
调整相机焦距与景深以优化构图
在特定光照环境下检验材质表现
生成资产旋转展示动画
Install
npx skills add EL4CTEO/blender-skills --skill blender-lighting-lookdev -g -y
SKILL.md
Frontmatter
{
"name": "blender-lighting-lookdev",
"license": "MIT",
"metadata": {
"author": "blender-agent-skills",
"version": "1.2.0"
},
"description": "Lighting, cameras and look-dev in Blender 5.3 - studio 3-point and product lighting, HDRI environments, sun\/sky exteriors, interiors, light linking, physically based light units, camera focal lengths\/composition\/DOF, cyclorama backdrops, looping turntables for asset presentation. Use when presenting assets, setting up scenes for rendering, or judging materials under consistent light."
}
Lighting & Look-dev
The execution model is in blender-core. Render settings are in blender-rendering. Full time-of-day, night and fog environments are in blender-time-of-day.
One call: presentation scene
scripts/turntable.py -- --objects Hero --rig studio --backdrop --frames 120 --lens 85
scripts/turntable.py -- --objects Hero --rig both --hdri //hdri/studio_small_09_2k.exr --hdri-strength 0.8
This builds a camera framed to the bounding sphere (on the narrower frame axis), a key/fill/rim area-light rig scaled to the asset, an optional 18%-grey cyclorama, and a pivot that orbits camera + lights + backdrop in a seamless loop. The asset itself isn't modified. Everything lives in the LD_Lookdev collection, and re-running replaces it. Set the render resolution before running, because framing depends on the aspect ratio.
Lighting recipes
| Situation | Setup |
|---|---|
| Asset / product review | 3-point: key 45° side, 30–40° up; fill opposite at ⅓ power and lower; rim behind for silhouette. Large soft area lights (size ≈ object), neutral grey backdrop, Khronos PBR Neutral view |
| Reflective product (metal, glass, car paint) | large softboxes/strip lights reflected in the surface, plus a black/white gradient environment. Shape the reflections, not the illumination |
| Exterior day | Sun light (angle 0.5° for sharp, 2–5° for softer) + sky (ShaderNodeTexSky, sky_type MULTIPLE_SCATTERING/SINGLE_SCATTERING; 5.x replaced "Nishita"; PREETHAM/HOSEK_WILKIE legacy) with sun_elevation/sun_rotation matching the Sun light (5.3: sun_disc now emits light, so turn it off when a Sun lamp is the sun), or an HDRI of the matching time of day |
| Interior | HDRI/sky through the windows + portal area lights in the openings, bounces ≥ 4, then practical lights (lamps) at real wattage |
| Character / portrait | soft key from above-front, a reflector-like fill, rim or hair light, an eye catchlight. 85–135 mm lens |
| Stylized / game screenshot | match the engine: one directional + ambient/HDRI, no fancy GI, so it looks like it will in-game |
- HDRI: Poly Haven (CC0) via the blender-mcp
search_assets/import_asset, orShaderNodeTexEnvironment+ Mapping (Z rotation aligns the sun). Strength 0.5–1.5. Clamp sun hotspots if they cause fireflies. - Light linking (4.0+, Cycles + EEVEE): set
light_obj.light_linking.receiver_collection/blocker_collection(on the light object) to light only what you choose, like a hero rim that doesn't touch the backdrop. Portals:light.cycles.is_portal = Trueon area lights in window openings. - Units: point/spot/area in Watts (a 60 W bulb ≈ point light 40–60 W in Blender), sun in W/m² (irradiance; 1000 ≈ physical midday, but use 3–10 with AgX for natural results), emission strength ≈ W/m². Keep lights physically plausible and control the overall image with exposure.
- Shadows: light size controls softness. A bigger, closer light is softer. Contact shadows should exist where objects touch, so check that nothing floats (
blender-asset-qaground_z).
Camera rules
- Focal length: 24–35 mm environments/interiors (keep verticals straight: camera level, or shift instead of tilting), 50 mm natural, 85–135 mm products and portraits (no distortion), 200 mm+ compressed telephoto.
- Composition: rule of thirds / centered symmetric for products, horizon off-center, leading lines, headroom. Show the silhouette (3/4 view at slight elevation 10–25°).
- DOF (
cam.data.dof.use_dof,focus_object,aperture_fstop): f/2.8–5.6 for products at real scale. DOF depends on scale, so a wrong scene scale ruins it. - Clip start/end tight around the subject (the script does this), which avoids precision artifacts.
- Sensor fit AUTO uses the larger axis. Portrait renders need framing on the width.
Look-dev procedure (material approval)
- Neutral setup:
--rig studioor a neutral HDRI, grey backdrop, Khronos PBR Neutral or AgX (pick one and keep it). - Add a calibration chart object if needed (a grey 18% sphere, a chrome sphere, a Macbeth chart) next to the asset.
- Turntable at 24–30 fps, 120–240 frames, 85 mm. Render previews with
render_batch.py --preset preview --format MP4. - Check the materials under 2–3 different HDRIs. A good PBR material holds up in all of them (
blender-pbr-materialssanity checks).
Gotchas
- World lighting is invisible if
world.node_treehas no Background → World Output link (the script ensures one). - EEVEE needs
use_raytracingfor good reflections. Light probes (Volume/Sphere/Plane) still help static GI in interiors. - Area lights that are too small and bright make fireflies in Cycles. Increase the size, decrease the power.
- A turntable that rotates the asset changes its transforms and animation data, which is why this rig orbits the camera instead.
Version History
- b1b21df Current 2026-11-15 13:19
