Mikachan - super. Can we see a screen shot of your shader and render?

rickymaveety
If you're getting all white, it's because the light is very strong everywhere so the entire surface is hitting the fourth color level. When working with this type of shader, you really want strong lighting variation so the shader has something to work with.

I suggest you delete or turn off all but one of your lights. Use just a single infinite or spot light at first, and try intensity of 70, 80, 90, and 100 % to see the various results.

You can also quickly adjust the sensitivity of the shader by changing the Diffuse_Value parameter in the Diffuse node. The Diffuse_Value is basically an amplifier of the light, so lowering it will reduce the amplification and allow even a very bright light to produce values below 1.

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