Spock Mosaics WIP4 [Modified background]

I made some mosaics with my kids this morning (they were so happy do make some by themselves XD ) so that I could modify the background near Spock's face and thus increase the contrast.
I think it's better now.
I really love the overall feel of this <3

Next step (and final step): adding the groud to fill the tiny spaces between the mosaics pieces ^^

---steps----
WIP - 1
WIP - 2
WIP - 3: Done with tiles?
WIP - 4: here