abstract appearance autumn autumnal backdrop background brown color colored colorful colors colour coloured colourful colours dark dropped edge edges fall fallen green leaves light lines maroon nature petals pink plants rain rain-soaked russet shapes shed soaked texture textures variations variety wallpaper water wet floor forest moss outside calm city garden invasion leaf London urban change changing decay HDR Portland season grass natural tawny yellow flowers halloween harvest orange red simple soft thanksgiving Aesculus glabra chestnut conker fruit half open quill blur eddy pools rocks spray stones waterfall