Actually I believe that is a real colour photo. Germans did have colour photography back then.
Unless you think these are also hand-tinted:
But it makes me wonder… did the surface finisher ( the painter) simply recreate his belief of the surrounding area on the 109 using paint or did he actually go out in the desert, grab buckets of sand and rocks, and glue it all onto the 109?
I read about the paint job of those aircraft a while ago so this is off the top of my head, I think it was an entire Jagdgruppe, and I believe the pilots were giving the paint shop detailed instructions how they wanted them painted and then they did it. They actually arrived in their Battle of Britain dress some time in late 1940 so they had to be repainted. I think on those they actually used Italian paint (OMG NON-REGULATION PAINT!!!!!!!!!111) and later F models sent to the theatre came pre-painted in RLM 79 (sand coloured) and 78 (the bottom colour, which different from RLM 76 which was used in Europe).