Slog3 to Davinci Intermediate "Crushing Blacks"

I've been working with S-Log3 footage for what wouldn’t be considered a very long time. Since my main habit is working with DaVinci Intermediate, I'm transitioning from S-Log3 to DaVinci Intermediate. However, during this transition, I'm experiencing a kind of black crushing in the image that I can’t quite make sense of.


In Image 1, the waveform looks normal — this is with the node disabled, meaning it’s the signal without any color management applied. In Image 2, we see the crushing that occurs when I activate the node. For comparison, I applied a conversion to LogC3 — which I was working with before switching to DaVinci Intermediate — and that’s shown in Image 3. That one displays a conversion as it should.


Is this a known issue? Am I doing something wrong?

Try setting Tone Mapping Method to none and then use Tone Mapping and Gamut Mapping only when going to Rec709.

Try setting Tone Mapping Method to none and then use Tone Mapping and Gamut Mapping only when going to Rec709.

Yes indeed, that was the problem.