Panels and panel assemblies include one or more transition surface features that comprise or provide a transition gradient between a first surface feature and a second surface feature. Surface feature types include surface texturing, coloring, decoration, and so forth. Transition gradients progressively change one or more attributes of the surface feature across the panel surface. Transition surface features begin at a first degree of the attribute at an origin, such as a point, line, or area of the panel or panel assembly, and transition to a different degree while moving away from the origin. Panel assemblies include a non-transitioning panel having a first surface feature type, a non-transitioning panel having a second surface feature type, and a transitioning panel disposed between the non-transitioning panels and having a transition surface feature that provides a transition gradient between the first surface feature type and a second surface feature type.