According to the Russian visa application centre in UK (London, Edinburgh) the photograph needs to be glued to the indicated space on the Russian visa application form and meet the following requirements:
Recent colour photograph (not more than 6 months old).
Taken against a light background (white or off-white) so that features are distinguishable and contrast against the background.
Clear quality and with the face in focus.
Printed on normal photographic paper(camera print)