SLog3 Thumbnails Display in Extended Dynamic Range - Need Rec709 Conversion in Project Panel

Forum|Forum|10 months ago
June 20, 2025
15 replies
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Hello Adobe Community,

I'm experiencing a thumbnail display issue with SLog3 footage in Premiere Pro 25.3.0 that I hope someone can help resolve.

Current Behavior
Source Monitor: When I load SLog3 clips in the source monitor, they display correctly with proper Rec709 conversion. The color processing is set to "gang to active sequence color management" and the footage looks properly tone-mapped with normal highlights and contrast.

Project Panel Thumbnails: The same SLog3 clips display in extended dynamic range in the project thumbnail view, showing completely blown out highlights and appearing very flat/washed out. This makes it extremely difficult to browse and select clips.

My Setup
Premiere Pro Version: 25.3.0 (June 2025)

Camera: Sony (SLog3/S-Gamut3.Cine footage)

Sequence Settings: Rec709 color space

Project Color Management: Standard workflow

What I've Tried
Based on previous forum discussions, I've attempted:

Auto-Detect Settings: Enabled "Auto-detect Log Video Color Space" and "Auto Tone-mapping" in Project Settings > Color

Display Color Management: Verified Display Color Management is enabled in Lumetri preferences

Interpret Footage: Tried color space override to Rec709, but this affects the actual color pipeline, not just

thumbnail display

Specific Issue with Settings Tab
I do know about the Lumetri Settings tab, but I've discovered a key limitation: when no sequence is selected, all "working color space" options are greyed out. This means I can only select the media color space (S-Log3) for my clips but NOT the output color space (Rec709).

This appears to be why everything is displayed as extended range in the project thumbnail view. Loading a clip in the source window while a timeline with Rec709 settings is active displays it correctly, but the project panel thumbnails remain in extended dynamic range.

Core Problem
The issue seems to be that project panel thumbnails are only using the media color space (S-Log3) without applying any output color space conversion (Rec709) since no sequence context is available for thumbnails. The source monitor works correctly because it can reference the active sequence's color management settings.

Specific Question
Is there a way to:

Set a default output color space for project panel thumbnail display?

Force thumbnails to use sequence color management settings even when browsing clips?

Override the thumbnail display behavior to show SLog3 footage tone-mapped to Rec709?

Why This Matters
When working with large amounts of SLog3 footage, having properly displayed thumbnails is essential for:

Quick clip identification and selection

Visual continuity checking across shots

Efficient media organization

The current extended dynamic range thumbnail display makes it nearly impossible to see shot content or assess footage quality from the project panel.

Show previous replies

P

Peter ReefAuthor

Inspiring

Maybe this has to do with lumetri settings like display color management. I wanted to follow your recommendation to preview color thumbnails in project panel first for quick normalisation. But as blown out extended range display or flattened log that's not possible unfortunately.

R Neil Haugen

Legend

I work with a lot of log material, which can go to any usable space, PQ, HLG, or Rec.709. In the Project panel, it's the 'gray' look of log media. Which I do prefer as then I can see quickly what's log and what's been shot Rec.709.

So I've not had anything with blown highlights so far. That would be not ... helpful, clearly.

I'm puzzled though about the S-log3 having totally blown highlights. I've worked with some, and it's always just the log gray/low-sat view of it. Never anything blown. Huh.

I would note, as I'm on a PC, I don't ever have the "extended dynamic range where available" option on in Premiere. I don't know what that might do, actually.

Everyone's mileage always varies ...