Only 8 tiles? OK, here's the first, I call it the "Entry" tile or "Surface Access" Tile. A hole to the surface from a ruined structure with sunlight and debris falling in. Even some plants growing where the sun allows it.
Since there's a restriction of 8 tiles for this challenge, yet I've preconceived of 12 I want to make, I will be providing 4 "bonus tiles" that because they will be a bit exotic from the standard dungeon tiles one would expect to include - will not count as part of this challenge. The "Entry" Tile is the first of these bonus tiles.
No tokens until the end.
I may change textures and colors but the 1st tile design is complete...