Added a few more image from Robo Recall, depicting quick exploration of street coverings that might have morphed and integrate into a tunnel. At that point, with the setting in SF, there was a need of a very crystal like building coming out of an existing building, in a realistic manner so i took inspiration from real life architecture and adapted to fun shapes that integrate compositionally into the environment.
Then the environment was moving to a Chicago type city, with wider streets and high rises. This needed different street props, and enclosures of space. So solar "trees" and huge curtain roofs populated the streets.