Environment practice

Wanted to take 1-2 hours and sketch environments that tell interesting narratives.

A crashed spaceship lands on an unusual planet. The pilot is injured and looks into the distance and sees a bridge with a building on the mountains. He decides to go there for help.

An astronaut discovers an unsettling structure glowing in the distance. Through the barren wasteland, he ventures to this structure.

An astronaut is exploring a planet, gathering organic materials. He comes across a giant spore, is this spore deadly?