Because XMP works via sliders and curves, you are less likely to get banding than with a poorly quantized CUBE. However, extreme LUTs may cause posterization in Lightroom because ACR processes in 16-bit, not 32-bit floating point like Resolve.
The most reliable and "official" way to perform this conversion is through Photoshop's Camera Raw filter. This process embeds the LUT data into an XMP profile. Open any image in Photoshop and go to Filter > Camera Raw Filter Access the Profile Creator : In the Presets/Profiles tab, hold Alt (Windows) Option (Mac) and click the New Preset (three-dot icon) Create Profile Load the LUT : At the bottom of the dialog box, check the Color Lookup Table box and navigate to your Name and Save convert-cube-to-xmp
file in your Camera Raw "Settings" or "ImportedSettings" folder. Alternative Methods Import .xmp as presets NOT profiles - Adobe Community Because XMP works via sliders and curves, you