bark blur blurred brown gap gaps green nature saavem surface texture tree trunk wood bird's eye forest germany Harz pattern pinery thick view abstract background beams concept creation decking design fence fill floor graphic illustration image indoor lines original outdoor planks render scrapbooking slats style timber unique vector wall wood grain board decay Dirt dirty door old paint painted painting plank red rusty urban angle Cromer perspective pier planking weathered wooden grunge lumber rust rustic