Opulent Art Nouveau interior, lavish ornate details, sinuous lines, flowing curves, stained glass windows, intricate metalwork, warm golden lighting, soft diffused glow, table lamps with floral motifs, floor lamps with organic shapes, pendant lights with iridescent glass, warm beige walls, rich wood paneling, plush velvet furnishings, whimsical decorative patterns, luxurious textiles, ambient indirect lighting, high contrast ratios, dramatic shadows, 1/2 composition, low-key illumination, realistic materials, atmospheric rendering.