This might be totally obvious but I cant find an easy solution so I need some help. I've built a Cyclotron in Maya for a project I'm doing. It consists of multiple objects with different textures applied. Some of these objects are grouped together (eg - door). Now what I want to do is animate the opacity of the door as a whole (remember its made up of multiple objects and textures). Is there an easy way to do this? ...surely I don't have to animate each component separately??