Bath or shower enclosure walls

A thermoplastic panel for a bath or shower wall, comprising at least one thermoformed thermoplastic layer, wherein

• the thermoplastic panel comprises a front side and a back side,
• the thermoplastic panel front side is configured to be visible and face an interior space,
• the thermoplastic panel front side comprises a tile pattern having a plurality of recessed grout lines surrounding a plurality of raised tile surfaces,
• each of the plurality of recessed grout lines includes two laterally spaced recessed groove surfaces and a raised intermediate surface positioned between the two recessed groove surfaces,
• the raised intermediate surface is elevated relative to the two recessed groove surfaces and recessed relative to the raised tile surfaces,
• the two recessed groove surfaces and the raised intermediate surface are each planar surfaces,
• the thermoplastic panel back side is configured to face away from the interior space, and
• the thermoplastic panel back side comprises a complimentary pattern having a plurality of raised grout lines surrounding a plurality of recessed tile surfaces, and
• the thermoplastic panel back side raised grout lines comprises two or more protruding parallel surfaces.