Put in a hopefully temporary workaround to make the Disc's Eye visible again.
The Warrior Priest update has caused some sort of incompatibility between what material/shader files are generated by the sdk and what the game expects; causing models that use custom textures to be invisible. Using the default "standard_transparent.material" file and adjusting the opacity prevents the model from being invisible but this material file does not allow a slew of other effects like proper first person perspective on models or other effects involving multiple materials layered on an object and means the model will be transparent.
Due to the eye mesh not having a backside I cranked the opacity to 100% so aside from some select scenarios you shouldn't really notice anything different with the eye.