Many NFT projects will have a pre-mint process, and then give the detailed drawing at a specific time. Before reveal the drawing, all the NFT under the Collection will be displayed as images in blind box state, and the corresponding images of each NFT will be different after revealing the drawing.
The Multi-Asset feature based on RMRK provides a more elegant way to realize the blind box. Lightm also provides a direct entry point where blind box metadata can be set at any time.
Lightm support setting Collection icon, banner etc. in setting Collection metadata.
Collections with metadata also get custom displays in the Collection display list. See: Index Page Intro