當光影不強，灰色的圖片要置入交界的觀念，來埋入色彩。

。When dark area is larger than light part, find the interface, put same value but different color with what we see on picture. For example the cad yellow could be the same value on he road as picture shows, but it comes with more saturated hue, which bring people's eye ball on it, can create a depth in canvas, instead of grey color /with nothing to read about .

. Need extra effort on this area to bring the light on color ( not the white color), ex. using more saturated dark color around the road, or deeper value on house shadow; these few different ways could create more light on road.