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:
Here is after I simple add a point in the midtones, without actually changing anything:
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
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).
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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?
Renderer is set to (Metal).
Changing to software only showed no change.
So that's not a graphics card issue. Has me stumped though ...
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.
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...
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!
System hardware, media involved data would help.
This hasn't been much of an issue for some time. Bummer it popped up for you.