At the bottom of the Inspector, there is a section to assign AssetBundles and Variants.Use the left-hand drop down to assign the AssetBundle, and the right-hand drop down to assign the variant.Click None on the left-hand drop to reveal the currently registered AssetBundle names.Note: AssetBundle names support a type of folder structure depending on what you type. For example, use the AssetBundle name environment/forest to create a bundle named forest under an environment sub-folder To add sub-folders, separate folder names by a /.