Thanks to Sarushka for new photos!
But I know we would to see more rare formal and private photos than ceremonial and events ones, but I did a research and found one of Maria with father at GHQ with officers, but can't find it at the moment.
So, these are ceremonial photos, even new for somebody maybe:
(1915)
Tsar at Sebastopoole it must be during war then:
Hope I was useful, and if some of these are new. I have one of Olga and Tsar from 1913, when find, I'll upload.