
The finished product, 70X50 cm of hard work with a tiny brush. (click on it to enlarge)
One way of painting stones: just "hint" them. In the castle stones I could clearly detect the horizontal, irregular lines, and much less the vertical ones. So that was exactly what I painted in the sunny parts, like the tower. Note that it is important to take your time to observe what "the character" is of the stones. Where does the light come from, how do you see the shadows, how are they shaped, what is their colour, is the shadow and light very clear...
The stones under the pillars are regular and square. I vary slightly in colour and paint them on top of each other, so that the rims of the aquarelle form natural shadow lines, and here and there I leave a small line unpainted (white)
Other stones are hopelessly irregular - but most of the time rectangular-ish. And because the light comes from above, the shadow will usually be under the stone.
Above the most varied piece of stone wall. Irregular, in size, colour, material, shadow and shade... I must admit that I "simplified" it a bit. I do that often, also with tiled roofs. (The brain still accepts it as a roof - although the tiles are much bigger than in real life...)

Don't get me wrong -I appreciate the input and I do wonder if it might be true, as I have noticed before that in general my work is recognized by women, they seem to like it better than men and also somehow understand the "deeper" meaning ... More later! And I'd like to read your comments, so don't hesitate to react. On 

Here below is my favourite - it looks so graphical and the colours enhance each other. But the other aquarellista's don't agree!! We left the (white) masking fluid on - the effect is interesting! (I think)
We won't get together coming week - I'll post about another aquarellista subject!