abstract appearance background bright brightly color coloration colored colorful colors colour coloured colourful colours glazed glazing hard orange surface surfaced texture textures tile tiled angled angles basic concrete curved curves curving external footpath gray grey grooved grooves ground hard-surface hard-surfacing lined lines mottled mottling outdoors outside path pavement paving perspectives rough streaked streaks surfaces textured variations fired layered layers lumps lumpy molten pottery surfacing thick thin casing firm hardy inside natural nature plants seedpods seeds shape shaped shapes shell Sizes smooth tactile two-sided woody wrinkled wrinkles