Create a hyper-realistic 8K architectural cross-section rendering of a multi-purpose room in a 17th-century Mexican hacienda, combining rustic charm with modern design elements. The room features weathered stone walls, with the patina of age visible but well-preserved. The floor is polished concrete in a warm ochre color, with a high-gloss finish that reflects natural light streaming through large windows. Red brick arches add an architectural touch, enhancing the historic charm of the space while providing a traditional yet elegant atmosphere. Incorporate Japandi-style pendant lamps that cast soft, ambient light, bringing a modern touch to the classic setting. In the background, design a discreet yet functional projection screen that blends seamlessly into the architecture, allowing for modern use without disrupting the historical aesthetic. The rendering should depict the room as if it were in a beautifully restored ancient building, maintaining the feel of an old hacienda in pristine condition, with both natural and artificial lighting enhancing the textures and details. Focus on creating an atmosphere of harmony between the rustic past and refined contemporary elements.