My personal tips
a) plan exactly what your aim is with the diorama . People usually view a diorama from left to right as if they were reading , so make the main viewing angle (the side you want to show in a competition, showcase or where a name plaque is ) with the story unfolding from that perspective .
b) keep it compact (i detail every square inch of my dioramas so the less empty ground the better . Most of my vehicles overhang the edges .
c) try to keep variation in height , flat ground is far less common , specially on battlegrounds .
d) Vary the groundcover , paddocks are not uniform grass types, height or colour .
e) Research the environment of the battlefield , if the battle was fought in hedgerows , then study the hedgerows in travel blogs etc of that area , get a feel for that area , make the diorama feel like a cold russian village if that is where it portrays .
f) Get inspiration from as many sources , study war time photos , read model magazines and product catalogues . I find the Verlinden Catalogue inspires just with the diorama accessories they carry . Study your favourite Modellers , our own Bob Letterman is a true master of dioramas and while I would not suggest to work on his magnitude of size , his techniques are pure inspiration .
Hope these help
Jenny :kiss: