abstract background bare bark bumps close-up colors colours cracked cracks cut-branches dry edge edges eyes grain gray grey grooves knots knotted layers lines lumber patterned patterns perspectives radial-lines ridges rough shape shaped shapes surface surfaced surfaces texture textured textures timber tree tree-trunk trunk uneven unusual variations varieties wood angles art artistic backdrop black blended blue brown circles decoration decorative depth design detailed image images interconnected intermeshed interwoven intricate intricate patterns kaleidoscopic patterns light loops points pulsating radiating red starbursts style vibrant wallpaper white lacy mandala orange pink purple speckled yellow