Stylized Diorama - Roadblock ahead!

Small project for a course i was taking part of. All done in Blender. All the colours are gradients of green and brown.
Scene (Total) tris count: 212398
MT-LB tris count: 91873 (Without tracks: 31090)
9K35 Strela-10 tris count: 92834 (Without tracks 30129)