Isolated prompt photon inclusive production cross section in pp collisions at $\sqrt{s}=5.02$ and $8$ TeV, and p-Pb collisions at $\snn=5.02$ and $8.16$ TeV. Vertical bars and boxes denote statistical and systematic uncertainties, respectively. Coloured lines denote JETPHOX pQCD calculations at NLO using the recent NNPDF4.0 proton PDF and the nNNPDF3.0 nuclear PDF. The BFG II fragmentation function is used to describe parton-to-photon fragmentation. Dashed coloured bands denote the theoretical scale uncertainties, and solid bands denote PDF uncertainties at 90% CL.