Same thing for the yard wall, the dry brushing technique was used to paint the stone textures.
The crypt was also painted using the dry brushing technique.
Black and white paint were mixed to obtain various tons of grays.
All walls and the crypt were painted together so there color will match.
Here is a view at the main entrance.
Here is a view at the walls along the dead tree.
Here a view at the crypt with the grey dry brushing applied on the stones.