Three-point light rig with illuminance ratios
In your harnessBlender toolMIT
Add key, fill and rim area lights aimed at a target, placed by azimuth and elevation, with fill and rim powers derived from illuminance ratios at their distances. Use it to light a subject for product, character or turntable renders.
What it takes and gives
- Operator
- baltor.light_three_point
- Parameters
- target, key_distance, fill_distance, rim_distance, key_azimuth, key_elevation, fill_azimuth, fill_elevation and 9 more
- Result
- An empty with three parented area lights constrained to aim at it.
- Blender
- 4.2 or later
- Axes
- Blender Z up, -Y forward
- Units
- metres
Limits. Powers follow the inverse square law from each light's centre, which is approximate for area lights that are large compared with their distance. The ratios hold at the target point only. Colours are linear RGB values, not colour temperatures. The lights stay aimed by Track To constraints on the rig empty; glTF export keeps their positions but not the constraints. Verified in Blender 5.2.1 with Cycles; written for the 4.2 API.
Details
- Kind
- Blender tool
- Engine
- Blender 4.2 or later
- Files
- 11 files, 122.1 KB
- Licence
- MIT
- Declared effects
- runs commands
- Checked with
- Blender 5.2.1, background (Cycles CPU for previews)
- Checks
- addon install and enable, operator runs with defaults, blender data matches core, addon disable unregisters, script mode runs, clean reopen addon file, clean reopen script file, gltf separate export, engine output clean
- Techniques
- Three-point lighting: key, fill and rim (back) light, Inverse square law to hold illuminance ratios across distances, Spherical coordinates for light placement, Euler XYZ angles that point the -Z axis along a direction
- Tags
- blender, lighting, light rig, three point lighting, area light, studio, rendering
- Identity
library.supply.creative_originals.0726895027e6903738b128bd.a2406dd84080b6d9- Version
a2406dd84080b6d986999f702a58d4c63e4e3dc9f7d5f76488a68e8163218cd3
The version is the SHA-256 of the item your harness downloads; every file in it names its own checksum.
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