Mostlikely, you have all your materials still set to a plastic lighting model. What you need to do is go to your surfaces tab, then click on sideways triangle in upper right and click on show surface list. This will list all the material zones in all of your figures. Doing this will allow you to select multiple material zones at once. Once you have what you want to fix selected, click on the advanced tab on the right side of the surfaces window, and scroll down to the bottom. The lighting model selectoins are a drop down menu, and you can select something else to set how the model reflects light. You can also tweak the glossiness settings from the Advanced menu, it is close the top.