[Chimera-users] Changes in transparency during animation

Hi, I'm trying to animate a change in surface transparency. I have made a scene with my molecule at 0% transparency and a second scene with the same molecule at 70% transparency. The problem that I'm having is that when I set the transparency in one scene that transparency setting is carried over to my other scene, so I end up not being able to animate changes in transparency. Is there a solution to this problem? I'm using Chimera version 1.10.2 on a mac. Thanks, Ashley