a synthetic resin background build chipboard composite fiberboard particle board particleboard pattern saw dust sawmill shavings texture wood abstract board design grunge lumber old plank rust rustic surface timber tree trunk wooden appearance branch broken cracked cracks grained grains gray grey palm palm-branch palm-tree patterns rough stringy textured textures wood-grains backdrop blank blocks border canvas colorful colors frame overlay paper squares thin antique brown chair embossed fill space panel round seat worn beam center centered diagonal horizontal line metal parallel planks rhomb structure vertical wall beige roof shadow siding yellow