Is the Vivecraft mod allowed to be used while playing on MyM servers? It allows the use of VR headsets to be used to play
If it is a server side mod then no, no if it is a client side.. maybe it can be whitelisted if there's a good reason to.
Its kind of both really, the client side part of it makes it so you can play with a VR helmet, and the server has the option to install a plug-in to enable more features. but it works just fine with the client side part. really all it does it modifies the screen so it looks right in the helmet and allows the use of controllers to control each arm, one with inventory, and one for doing actions ie. swinging sword, breaking blocks, eating, ect, based on how you move your arm with an item selected.