The idea behind this diorama is simply to display the model, the scene is a fictional based crew training in their new M113A1 who stumbled upon another infantry unit training in the wilderness. I'm still working on the infantry models at the moment.
Now this is my first diorama so bear with the poor workmanship, but here are photos of the progress thus far:
The masked 8x10" picture frame with simple topography of a road.

First pass after laying plaster of paris with sand and some 15 year old static grass, needless to say, the static grass looked like astroturf so I had to scrap it.

Second pass with more sand, moss, lichen and a little ballast. Coated with a glue/water spray. (That's what I'm supposed to use, correct?)


Here is the M113 with interior details, also my first replica model.


Again this is my first diorama. I'm an architecture student having built many, many architectural models, but I've found that in my spare time I've begun to enjoy this diorama model.
A critique and tips on how to continue and work on technique would be wonderful at this point as how to continue with this first diorama.
Thanks!!