The background of this DOA1 stage looks more impressing, than the background textures of DOA5's Ends of the World. XD
I disagree, personally I love the End of the World stage even for the background XD
Off Topic:
However for fairness has to be said that the fate of DoA1 was the same of the passage from DoA4 to DoA5: when released on the arcade the original version of DoA1 used 3D models in background, something that was sacrificed in all the next conversion (DoA1 for Sega Saturn/ DoA1 for PSX/ DoA++ on arcade), with pre-rendered images used for the background in favor of an higher quality for the characters models (not sure if also the music quality was lost).
How it's said "History is repeating itself".
Here you can see a video of the original arcade version for DoA1: