But yeah, the flat area in Marseille doesn't leave you with a whole lot to work with. You can blame the low-res graphics on my lack of resources and knowledge of how Party Planner 64 handles textures.
Honestly, the best way to do it is to make your own background! I understand that this takes a lot more effort than just a simple test like this though. Another thing that could help a lot though is just painting paths over the screenshot.