If I were to sculpt a 3D model based on the attributes of "beautiful random sentences," I would envision a dynamic and fluid form that combines elegance with a touch of unpredictability. The sculpture would capture the essence of the written word by featuring graceful curves and intertwining lines, creating a sense of movement and rhythm. It would have a harmonious composition of irregular shapes and sizes, representing the randomness aspect. To emphasize the beauty, I would incorporate intricate details such as delicate engravings resembling calligraphy or symbols representing different languages. These details would showcase the diversity and richness of language. I would use a combination of contrasting materials, like polished marble or smooth glass, to represent the smoothness and clarity of well-crafted sentences. The sculpture could potentially include vibrant colors intertwined within the forms, symbolizing the creativity and excitement sparked by random sentences. Ultimately, this 3D model would embody the concept of enthralling linguistic spontaneity, conveying beauty through its graceful lines, intricate details, and captivating aesthetic.