Spent the afternoon working on the stonework again. These were cut into the surface of the papier-mâché. I like how they came out.
I also used a sheet of thin card to cut out the stonework for the trench mortar emplacement. Looks rather like ceramic bathroom tile in this picture, but I will give it wash of PVA/filler "goo" to soften the edges. All will be hidden under a coat of paint later anyway.
The top "decking" between the ruined walls will get the same treatment. I will add a hatch to the floor to represent access to the MMG pit below.
Another day or so with the trench interiors, then I will begin work on the walls. About another week to go and it will be ready for painting!