Remove the large dark-framed window on the left wall of this sauna interior and replace it entirely with vertical wooden slat paneling that seamlessly matches the adjacent walls. Use the same light-to-medium warm wood tone, the same vertical plank orientation, grain and spacing as the surrounding sauna walls. Blend the new paneling naturally with the existing ceiling, corner joints and lighting so it looks like one continuous wooden wall. Keep everything else in the scene unchanged: the wooden slatted ceiling with hidden LED strip lighting, the curved illuminated bench tiers, the round stone heater with dark rocks on the left, the wooden bucket on the back shelf, the grey stone floor tiles, and the overall warm ambient lighting and photorealistic quality.
