3D desert environment made in Unreal Engine. 

Created with premade assets from Unreal Engine Store. 

Concept: The crash landing of the falling star unlocked a hidden wellspring in the middle of the desert. After many centuries the wellspring grew into an oasis within the crash site, sitting under the hot sands of the desert and surrounded by rock walls. The area around the oasis is teeming with life, from the plants and palm trees to the native critters and birds that visit.
Over time people settled in the surrounding area and used the oasis as a marketplace. As centuries passed and those civilizations fell and the oasis was abandoned.
If adventurers are willing to cross the harsh unforgiving desert they would find cracks in the earth and by delving into them they would discover the hidden oasis.