Howto use materials

Hi. I haven’t find anything about how to use materials in the manual. Could you guys give me a short explanation on how to use them? In particular im trying to make a ship glow in space using emissive color.

One more question, seting up a shader seams to be very easy:

myShader = Shader.load("myshader.sha")
myModel.setShader(myShader) 

It just that i don’t have time to learn shaders at the moment. Is there any site with pre-made shaders from where we can dowload this stuff to use it our programs. I was looking for a sader that would let me associate an emissive intensity to a grayscale map to add to top of the usual color texture.

Thanks in advance.