Flakes 3D Texture Shader
Defines the size of the flakes.
How randomly distributed are the scales.
Defines the proportion of the plane covered by flakes. A 0.5 density means that 50% of the surface is covered by flakes, the other 50% produces no flakes (a vector 0.5 0.5 1.0, in tangent space it has no effect ).
On how may layers are the flakes distributed. Top layers hide bottom layers.