Sharing Some free software to add flavor while playing Simutrans
CinemaDrape : You can make the contour of desktop darker (Can simulate blury screen contour)
ColorVeil : Can add color filter on desktop (Can add layer of color to simulate atmospehre while playing)
Search with word and it should appear at top search result.
Unfortunately, using both at same time will override contour color and opacity.
Maybe they help foresee what it would feel if graphical option is added?