want these items to compare?
you did not set the material to force two sided did you?
Opacity (Realistic and Advanced Types)
Sets the opacity of the material. A completely opaque solid object does not allow the passage of light through its surface. An object with no opacity is transparent.
Set to 0
Reflection (Advanced and Advanced Metal Types)
Sets the reflectivity of the material. When set to 100, the material is fully reflective and the surrounding environment is reflected in the surface of any object to which the material is applied.
Refraction Index (Realistic and Advanced Types)
Sets the refraction index of the material. Controls how light is refracted through an object with a partially transparent material attached. For example, at 1.0, the refraction index of air, the object behind the transparent object is not distorted. At 1.5, the object is distorted greatly, as if it were seen through a glass marble.
Translucency (Realistic and Advanced Types)
Sets the translucency of the material. A translucent object transmits light, but light is also scattered within the object. The translucency value is a percentage: at 0.0, the material is not translucent; at 100.0, the material is as translucent as possible.
What they are trying to say here is that at 100 translucency there is a lot of light being scattered and your class materials will not appear clear. Use a small translucency number that is other than zero, and less than 30 to maintain clarity.
Try 50 to start here.