Light Probe Analyzer

Analyze HDRI environment maps for luminance distribution, light source detection, intensity measurement, and dominant light direction. Match your CG lighting to real-world environments.

Drop your HDRI file here

or browse — HDR, EXR, TIFF up to 256MB

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FAQ

Frequently Asked Questions

The analyzer processes an equirectangular HDRI and reports: Peak Luminance (brightest pixel, in cd/m²), Average Luminance (scene-wide mean), Dynamic Range (min-to-max EV stops), Dominant Light Direction (azimuth/elevation of the brightest light source), Color Temperature (Kelvin of primary light), and Source Count (number of distinct light sources above a configurable threshold). This data lets you match CG lighting to real-world conditions captured in the HDRI.
Peak luminance tells you where to set your viewport/film exposure. Dominant direction tells you the sun/primary light position in your 3D scene (convert azimuth/elevation to XYZ for light placement). Color temperature helps you set the correct white balance and light color. Dynamic range indicates whether tone mapping or exposure compression is needed. Multiple sources reveal where fill/rim lights should be placed.
cd/m² (candela per square meter, also called nits) is an absolute luminance unit measuring light intensity per surface area. EV (Exposure Value) is a relative logarithmic scale where each +1 EV doubles the brightness. EV is commonly used in photography and rendering to adjust exposure. The analyzer reports both cd/m² for absolute reference and EV stops for dynamic range measurement.