Choosing the right roller nap for smooth drywall can significantly impact your painting results. A shorter nap, typically around 1/4 to 3/8 inch, is ideal for achieving a sleek finish on smooth surfaces, while thicker naps are better suited for textured walls. Factors like paint type and the desired sheen also play a role in your selection. Additionally, consider the quality of the roller itself, as it can affect the application and overall look. Curious about how to choose the perfect roller for your project? Ask Improvi.ai for personalized guidance!