Truck looks good if you’re going for more of a dull plastic feel. Interesting color scheme. It looks like a triadic color scheme to me.
Your day scene looks nice. Maybe the light is a little bit bright for my taste. The night scene is nice, too. White bulbs are kind of boring, though, and tends to make things feel clinical. It’s getting a little dark on the right side, too. Try changing the color of the lights and see what happens to the mood. Good work so far.
