abstract appearance background grains grainy impact impacted patterns rain rain-drops rain-spatter sand spatter spattered surface surfaces texture textures backdrop colour pastel spatters stained stains yellow grunge grungy paint paints splatter splatters canvas colours hues painting shades tones variations atmosphere city damp gray grey rain spattered window roofs rooves Singapore street scene wet window art color colorful colors drawing fish illustration pastels rough spaltter card cardboard collage paper papier patel series variation various