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

Forum|Forum|10 months ago
June 20, 2025
15 replies
840 views

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.

P

Peter ReefAuthor

Inspiring

I am on Mac. Tried extended dynamic range but it didn't change thumbnails. Thanks for your help

R Neil Haugen

Legend

I'm puzzled by the difference in behavior. I'll have to do some puzzling in the shop later today.

As you're on a Mac, I'm PC, there are some inherent differences there. Do you have "extended dynamic range where available" on, btw?

Everyone's mileage always varies ...

P

Peter ReefAuthor

Inspiring

Ok, thats what I get when I DEselect "Color Manage Auto Detected Log and Raw Media" as well.

But for me its impossible to grade clips based on washed out log look if I try to follow your advice to speed up grading. So I would hope there would be a rec709 conversion for thumbnails as well.

R Neil Haugen

Legend

Log look is the grayish, low sat view. After normalization, doesn't look log anymore, right?

But they're not blown out in the project panel. Just the low contrast gray look.

Everyone's mileage always varies ...

P

Peter ReefAuthor

Inspiring

@R Neil Haugen Just to make sure. "On my PC, they all appear in the log look, not like that." What do you mean by "log look" the typical flattened log look or the rec709 converted log look?

R Neil Haugen

Legend

That would be nasty. And isn't the behavior I'm getting. Which is puzzling.

Everyone's mileage always varies ...

P

Peter ReefAuthor

Inspiring

As i said, if i DEselect "Color Manage Auto Detected Log and Raw Media" all thumbnails are in log look.

But its impossible to see thumbnails of log footage converted to Rec709 so they look natural.

R Neil Haugen

Legend

I've got Red raw and log, a number of S-log variants , ProRes in log, some Panny and others. On my PC, they all appear in the log look, not like that.

Very puzzled.

Everyone's mileage always varies ...

P

Peter ReefAuthor

Inspiring

Thanks a lot for your help! @R Neil Haugen Heres the Screenshot.

I am running Macos 15.5 (24F74) and Premiere 25.3.0.

When I select "Color Manage Auto Detected Log and Raw Media" its all blown out in thumbnail view.

When I deselect it, its just the flattened log - look.

In source view it correctly converted to rec709 as a timeline with corresponding settings is open.

But theres no way to see slog3/sgamut3cine from FX3 converted to rec709 in thumbnail view.

I would love to use your grading workflow tackling thumbnails first and then refining in the timeline.

But thats not possible if I cannot see the color.

R Neil Haugen

Legend

I'd love to see a screengrab of your project panel.

And what's your OS?

Everyone's mileage always varies ...

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