For most purposes, LUT's and even Looks (just an Adobe-named mini-variant of the cube format) from 'outside' the program need to be accessed by navigating to them. In both the Basic and Creative tabs, the second and third options ... " [Custom] " and " Browse " ... bring up a navigation/finder window, navigate to the folder where you store your created or acquired LUT's/Looks and select one. Some cube LUT's can ... if put in the "technical" LUT's folder ... show up in the drop-down lists. Many don't. And with many cube LUT's and Look's you can simply change the part after the dot to the other ... and they work fine. Not all do, however. A bit of advice on the use ... "tech" LUT's are designed to either bring a "flat" camera footage (shot in any of the Log formats) "back to normal" or to take a camera into say Rec709 or from Rec709 to some other color space by applying specially designed curves in their lookup tables for both luma & chroma. They are always built of course with the camera settings totally 'nailed' as far as white balance & exposure within the carefully setup lighting contrast. So ... for best utilization, it is good to 'feed' them a properly WB, exposed, and contrast clip. How? The ideal is to have the clip be in the second step of the process chain, and set 'in place' ... then you go back to the first step and correct the WB, exposure, & contrast as seen through the tech LUT in the monitor & scopes. So within PrPro, you'd invoke a Fast or Three-Way color corrector effect first ... then go to the Lumetri Basic tab, and apply your tech (corrective) LUT. Then go back to the earlier effect (which in the Effects Control panel will be above the Lumetri Effect control) and do your basic technical "grading" for again, white balance, exposure & contrast. Watch the Lumetri scopes while you're doing this along with your playback monitor ... though if you learn how to study the scopes, you'll do more in "tech" grading looking at scopes than the monitor. The idea is to get the program looking technically correct ... not stylized. After this, go back to the Lumetri panel and work away doing your style work. All the actions you do there are in the process after the LUT so they don't affect it at all. Now ... if you're also using a style LUT/Look, say a film-stock/print-stock combo ... let's say the "Kodak 5205 Fuji 3510" option on the built-in list. A film/print stock LUT is designed to give the "look" of a particularly camera film-stock (in this case, the Kodak 5205) which was then printed for release on the Fuji 3410 print stock. The print-stocks are transparent films with ... well, very similar to a color print's emulsion so it's a positive image ... sort of like an old slide film. They each had their own "feel" so to get a look like a particular film you need to mimic what that film was shot on and then printed on that particular release print looked like. But wait ... that specialized LUT/Look has the final curves for chroma & luma baked into it ... if you change anything after that LUT, you no longer have that precise look/feel ... so why bother using it in the first place? So ... very much like the tech LUT above, you need to feed it the right signal content in your styling work so that ... seen through that LUT/Look, your project looks like you want. To do this ... I suggest adding another Lumetri effect after the first one, as there's no other built-in way to apply LUT's in PrPro. Now ... using the controls from the Effects controls panel (not the Lumetri panel on the right side) ... add in your film/print or 'style' LUT/Look. Then ... go to that first instance of Lumetri in your Effects Control panel ... and use the controls there while watching your scopes (some) and your program monitor a LOT ... and make your project look ... "right". Sounds complicated ... but do it once, and it's not. Both steps are realistically the same. Neil
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