Rainbow Six Siege may experience lag due to various factors, including hardware limitations, outdated drivers, and network issues. A big determinant of how smoothly the game plays is your GPU, CPU, RAM capacity, and your graphics settings. Assuming you have a fairly powerful PC, try adjusting the following settings for optimal gameplay: Lens Effect – Off, Zoom-in Depth of Field – Off, Anti-Aliasing – Off, Ambient Occlusion – Off, Reflection Quality – Low, Shadow Quality – Medium, LOD Quality - High or Very High, Texture Filtering - Anisotropic 4x, Texture Quality – Medium.