I'm building some sort of a city for a top-down shooter. The screenshot below (zoomed out) shows less than half of what i have made so far (around 1000 sprite instances in total). Red sprites being the walls of the buildings while the rest being just props (random things scattered around). I want to make the city (kinda) bigger, 3 times the size would be nice. Requiring many more sprites if following the same pattern.
So my question is: what can i do to minimize the impact in performance having that many sprites?
OffTopic: Seems i cannot post any images yet, that's too bad.