In Roblox 3D modeling, atlases (or texture atlases) are single images that combine multiple smaller textures for different parts of a model.
They improve performance by reducing the number of files Roblox loads and simplify managing textures for complex models (like characters with clothing or accessories). Atlases use UV mapping to link specific image areas to corresponding model parts.
To create them, use tools like Blender’s texture packing or Roblox Studio’s Image Editor—this keeps projects organized and ensures smoother in-game performance.