WIP - Space Marines diorama - staging

As usual I can't help but share with you even my smallest progress. I have here the initial staging of my Space Marines diorama using styrene sheets ( pla plates ) and lots of PVA glue ( white glue ).

I wanted to somehow show a bit of story on this little diorama as that is what dioramas are for. I mean you can't put a model in the middle of a desert and call it a diorama. Oh well I think you can call it a diorama as the story is simply the model running out of gas or dying in the desert ( lol ). Anyways I wanted to depict a bit more complex story behind mine.

I wanted to depict a squad of Space Marines scouting a deserted base. The model at the front has a sort of gadget showing that he is " detecting " something " behind the walls ". Pretty straight forward story telling I think. The overall diorama or the story of the whole scene will be complete once I place some Tyranids on top of the base.

The squad of Space Marines will be unaware of the danger on the top of the ruined walls. My composition shows that the Space Marines has no options but to engage the enemies coming from above... needless to say, I will make sure that the fate of all the Space Marines and their chance of survival looks very low.

The high walls ( or at least they look high in person ) gives the whole scene a tense and crowded look to the Space Marines. The walls adds to the difficulty of survival as the Space Marines has NO where to go. I gave the whole composition some angles to add interest as I do not want a flat floor and a super flat wall.

More Tyranid models, detailing and damaging the walls should complete this diorama. Anyways here are a few more photos of my progress so far...