My project consisted of images with different seasons and lighting so I needed to make
- variations of some models (like trees and ground),
- variations of some materials (wet and dry materials, dry leaves etc),
- variations of lighting.
So from the beginning, I tried to keep everything organised, named everything properly and used layers to organise things and grouped layers. I believe this is very important and saved me a lot of time.
First, I modeled the base layout of the concept and adjusted my camera point of view. This is a important step because I can adjust level of detail in my models according to how close they are to the camera. So I defined zones:
1.zones with high detailed models,
2.zones with medium detailed models
3.zones with less detailed models
or in other words, Foreground,Midground and Background.