How to make my sphere be influenced by light (normals calculations)?

Hi JME Fans!

I am totally new to JME and have following problem.

I can activate light, create spatials, rotate them give them color but I don't understand how to make them look 3D like. The are all plain red.

I know that normals play an important role. Are the normals automatically generated when I create a Sphere object? What exactly do I have to do to make my red spheres be effected by light?



Take a look a ?

Make sure that ambient color are not set to (1,1,1), but something like (0.5,0.5,0.5).