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  • We have a simple 3D model of the body (like cube or sphere), with texture parameters like Glossy BSDF, so the body can reflect light.
  • The body is lighted by a light source (Sun).

scene example on the figure below

Scene example

Is there a way to measure light reflected from the 3D model (in some units...Flux, candles, no matter what) in the position of the camera?
If YES, can this be done by python scripting?

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  • $\begingroup$ The only way was to generate video and get a Flux of frames $\endgroup$
    – Viktor
    Commented Sep 26, 2022 at 20:14

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If you use Cycles, save the output in EXR format; then, the units will be radiance in W/m2/sr. See: EXR output units.

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