Exposure change when enabling something in Lumetri

Community Beginner ,
Jul 16, 2019 Jul 16, 2019

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Hello,

This is weird to explain, but recently been having this issue a lot whenever I change/enable something within the curves, creative, or color wheels tabs within Lumetri. The exposure changes drastically like something was modified heavily.

Here I have a clip prior to adding a point to adjust the curve:

Screen Shot 2019-07-16 at 6.27.50 PM.png

Here is after I simple add a point in the midtones, without actually changing anything:

Screen Shot 2019-07-16 at 6.27.57 PM.png

The image blows out in a weird way. This has been happening more and more frequently recently and I'm not sure why. Happens within curves, creative (when applying a LUT), and sometimes color wheels when I alter exposure or a color.

MacBook Pro (15-inch, 2018)

2.9 GHz Intel Core i9

32 GB 2400 MHz DDR4

Radeon Pro Vega 20 4 GB

Mojave 10.14.15

Read/write:

Glyph Atom Pro 1TB Thunderbolt 3 NVMe SSD (2600~ MB/s Read/Write Speed)

Glyph Atom Pro 500 GB Thunderbolt 3 NVMe SSD (2600~ MB/s Read/Write Speed)

Premiere Pro 13.1.3 (happened before updating as well).

Thanks!

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Adobe Community Professional ,
Jul 16, 2019 Jul 16, 2019

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What is your setting in Project settings dialog for Mercury Acceleration?

Does this happen if you change that to Software Only?

Neil

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Community Beginner ,
Jul 16, 2019 Jul 16, 2019

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Neil,

Renderer is set to (Metal).

Changing to software only showed no change.

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Adobe Community Professional ,
Jul 16, 2019 Jul 16, 2019

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So that's not a graphics card issue. Has me stumped though ...

Neil

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Mentor ,
Jul 17, 2019 Jul 17, 2019

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from what I've been teaching myself, with tutorials, the black and white points  ( points in the two corners ) target a different luminance than any points put on the line, which effects the gamma range ( different than the corner black and white points ).

apparently by putting a point on the line you are 'activating' some gamma setting that was not being recognized before.

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Mentor ,
Jul 17, 2019 Jul 17, 2019

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maybe drag the black up along the side of curve tool and see if it does the same as putting a point on the line.. it shouldn't if it's what I am guessing is the problem...

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Explorer ,
Oct 28, 2021 Oct 28, 2021

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Hello, wondering if this ever got resolved. I'm here in v15.0 and it's happening to me as well. But not just curves. If I add any kind of secondary adjustment (even in color wheels or vignette for instance) the exposure completely changes. Thanks!

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Adobe Community Professional ,
Oct 28, 2021 Oct 28, 2021

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System hardware, media involved data would help.

 

This hasn't been much of an issue for some time. Bummer it popped up for you.

 

Neil

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