Do I need to buy both for luminosity masks? It’s an important feature for me but I’d like not to pay for both.
If you purchase only FilmPack 7, you will be able to use the luminosity mask in the stand alone version. However, to have access to the luminosity mask from within PhotoLab you must have a license for both PhotoLab 7 and FilmPack 7.
…and as always: test it with the free trial you can get from dxo.com.
I propose you prepare and take notes of the things you want to test/see to make good use of the 30 days.