Faux stone blocks in Tower 1

Today I did the first roughing-in of the stone blocks on the ground floor of the First Tower.

I painted the walls of the room a medium grey.

Then I used a few glazes of darker grey, lighter grey and a warmer tone (raw umber) overtop of the medium to give me a stone texture.

Then I painted the grout lines of the blocks freehand.  I now need to go over individual blocks more and make them tidier and more varied in colour.

Here's the result so far: