Gamut Mapping Part 2: Getting to the Display

[Thomas_Mansencal]

@alexfry

I feel the frame of the CG woman’s face looks far less ‘cinematic’ through the ‘naive DRT’, yet provides a clearer view of what’s actually going on with the asset. More true to ‘the eye’ than ‘the camera’. This feels like a win for surfacing and look-dev, where creating a robust and versatile asset is the goal, but a loss for Lighting and Comp, where ‘make my movie look like a movie’ is the unsaid note hiding under everything.

This echoes my current thinking looking at those images.

@alexfry

The explosion on the other hand feels far less realistic to me (take that for what it’s worth, my real world exposure to explosions is pretty limited).

A possible explanation could be the Bezold-Brücke Effect: As luminance increases, there is a notable expansion of the yellow wavelengths roughly above 500nm and also for blue wavelengths under 500nm.

Now that we have opened the can of worms, shall we talk about colour appearance modeling?

• Surround/Viewing Conditions
• Stevens Effect
• Hunt Effect
• Abney Effect
• Bezold-Brücke Effect
• And the remaining ones of https://nick-shaw.github.io/cinematiccolor/advanced-colorimetry.html.

Cheers,

Thomas