Lumetri presets?

Hey, understood!

The way the Lumetri's pair of LUT/Look slots are designed, the Basic tab's "Input LUT" slot is considered for "technical & corrective LUTs", assuming they will all be for camera media that requires such things, as the various Log and RAW codecs/formats. The companies all produce .cube LUTs for those, and so ... that's built for .cube LUTs. (We are talking engineers here, you know ... )

The intriguing thing is technically, a "Look" is an Adobe variant of the LUT form ... many looks, you can change the file association type tag from say .cube to .look, and the thing still works. IF you're in the Creative tab ... or change a .look file to .cube and often it will work in the Basic tab.

The Creative tab's Look/LUT slot will take either form. Although the engineering team imagines that the Creative tab is where a "look" for the project will be applied, such as for say a 70's soft-shadow/highlight roll-off look.

The one problem ... is both slots are in the "wrong" place. Camera tech LUTs are designed to be applied to fully white-balanced corrected media ... that's how they BUILD the LUT's in the first place. So in operation, they expect you will apply the LUT in the 'chain', then go before it to correct the clip to "neutral" essentially ​through​ the LUT. As say in Resolve, you apply a LUT to a node, and then within that node make changes to the media while watching scopes & monitor. Resolve will ​always​ apply what controls you change to the media ​before​ it sends the signal through the LUT.

PrPro does it backwards ... the LUT is first, then you correct the media ... just screwy.

The best place for the tech LUT ... is the Creative tab's lut slot. Then go to the basic tab to correct the clip for neutralization, then past the LUT using the Creative tab, Curves, Color wheels, or HSL Seconday, to work on the look of the now corrected/neutral clip.

It works the same if say you're trying to apply a particular camera film-stock LUT to a project, a film used in Cinema in the good old days. Drop it in the Creative tab slot, then correct for neutral in Basic tab.

The problem is though they assume that "film print-stock" LUTs will go in that Creative tab slot, they can't ... without losing all the controls past that.

Why? If you're using a LUT/Look to get a particular look of ... yea, that 70's soft black, soft whites, and subtle shadow/highlight rolloffs ... that ​has​ to be the last thing to affect the media. If you change anything ​past​ that, well ... you no longer have the look of that LUT/Look, and ... well ... what was the point, then?

So to apply a final print-stock (theatre print) Look, you need to either use a second instance of Lumetri after the first one simply to apply that Look, or ... perhaps use a LUT Buddy effect below Lumetri (or on an adjustment layer above your timeline) and apply the LUT through that. LUT Buddy is pretty picky ... mostly likes LUTs it's created.

I actually use the Tech slot LUT to correct for media that has say over-brights or super-darks, anything that on import/placement on a sequence is showing over 99 or under 1 on the left side scale of the RGB Parade or Waveform scopes. As the Basic tab controls aren't allowed to touch anything above 99/below 1, that way I can bring media back into correction capabilities. I made these using the Curves & Color wheels tabs of Lumetri (which can touch that data) and saved as a .cube LUT, naming them 1DownHighs and 1DownHighsUpDarks or something and putting them in the Tech LUTs folder. They're the first couple that show in that drop down list.

Neil

the LUT dropdown won't let me select looks

You actually want the Browse option.