archsynth prompt vehicles only on dark gray asphalt strict placement muted colours mode edit insert base image uploaded cityscape global rule critical this is a pure insertion task the base image must remain pixel identical everywhere except for the newly inserted vehicles no other modifications are allowed vehicles must be placed only on dark gray asphalt roads absolutely nowhere else vehicles cars insert cars only on dark gray asphalt roads do not place cars on lighter asphalt roads sidewalks plazas green areas or buildings all streets are double lane roads scatter cars sparingly for realistic traffic cars must follow lane direction and curvature cars must match the scene s lighting shadows and perspective car colours should be muted natural blending with the environment buses insert buses only on the front main road dark gray asphalt do not place buses anywhere else limit to a small number of buses 2 3 buses must be correctly scaled aligned to lanes and match lighting and shadows bus colours should also be muted natural absolute hard constraints do not add remove modify or replace any existing pixels outside the vehicles do not add or alter people buildings pavements landscaping water or any other object do not change lighting shadows colours materials or camera perspective outside the vehicles vehicles must be placed strictly on dark gray asphalt roads only no vehicles elsewhere under any circumstances result the final image should be identical to the base image with sparse cars on dark gray asphalt roads only buses only on the front main road vehicles coloured muted natural to blend with the scene no other changes anywhere else