A molded plastic structure (100) can include an in-mold decoration (112) having at least a first illumination feature (108) positioned at a first portion (142) of the molded plastic structure. The molded plastic structure also can include a first substrate (114) positioned proximate to the in-mold decoration, and a substantially optically clear or translucent second substrate (116) positioned proximate to the in-mold decoration. The second substrate can extend from the first portion of the molded plastic structure to a second portion (144) of the molded plastic structure. The second portion can be distal from the first portion. A separation layer (320) can be positioned between at least a portion of the first substrate and at least a portion of the second substrate. The separation layer can backscatter a substantial portion of light incident on at least a first side of the separation layer.