Outdoor 3D game environment
This post will be updated and specifics could change.
High-poly centerpiece(s) modeled & textured
Low-poly supporting objects modeled & textured
Animated camera (5-15 seconds moving shot)
Terrain: sculpted & painted with 3+ repeating textures
Foliage (grass, bushes, & trees come with Unity Standard Assets Environment Package) rocks, rubble, etc
Post Processing Behavior setup
Rendering Path = Deferred
Tonemapper = Filmic (ACES)
Add animated characters (2D or 3D)
Add your names in the Unity UI or world space (be subtle)
Outdoor 3D scene should include a foreground with 1 or more centerpiece objects that use high-poly modeling techniques and are lit using 3-point lighting; and a background made up of 4 or more supporting objects that use low-poly modeling techniques lit with skybox, directional light, etc.
Animate a simple camera movement like a crane, pan, or truck, 5-10 seconds.
Bench in a park (foreground) with city skyline in background
Escape pod (foreground) with crashed ship in background
Battering ram at city gate (foreground) with castle in background
Spaceship on landing pad (foreground) with alien city in background
Gypsy wagon (foreground) with carnival in background
Fountain (foreground) with village in background
Pirate ship (foreground) with port-city in background
Ruined city gate (foreground) with ancient temple in background
Space station (foreground) with planets & galaxies in background
Cemetery (foreground) with haunted mansion in background
Expensive car (foreground) with fancy hotel complex in background
Wrecked car (foreground) with post-apocalyptic city in background
Turn your scene up to 11!
I donāt want to see the first boring thing that pops into your head, find a professional example from a game, movie, or Artstation, and then try make your design even better.