@daisuke
Yeah, sorry, I can sometimes be harsh when criticizing an art piece.
The atmoshere of the render is amazing. Btw, If you have problems with power, don't be afraid to send the files next time you need to render it. I will be glad to give it some time to render.
Believe it or not but there are textures, the floor has an asphalt texture, there's also a HDRI skybox but i guess things like the low exposure, added volumetric ambience and the water puddles make it stand out less. I wouldn't say i was aiming for a realistic night scene but instead for a more cinematic and mysterious one.
As a bonus, here is an outtake night scene with normal exposure and three alternate takes on a day setting with HDRI light. #blender