LookingGlass
The mod name LookingGlass refers to the famous literary work "Through the Looking-Glass", which continues the story of Alice's adventures in Wonderland.
This mod serves as a software toolkit that developers of other modifications can use to create dynamically updated visualizations and animated representations of various dimensions. All the CPU-intensive tasks associated with rendering other worlds such as calculation of graphics, loading the dimension, and processing all the vertex data are taken care of by LookingGlass, giving a very high-level interface to see into the other dimension.
The mod can be freely included in modification packages. No direct permissions are required. However, the project must provide lists containing all included modifications along with their authors' information.