The Cell Noise texture node generates a random checker pattern that has a cellular look when scaled appropriately (figure 1). 



Cell Noise



Figure 1: The Cell Noise node and it's associated parameters


Cell Noise Texture Parameters

UVW Transform - Positions, scales, and rotates the surface texture.

Projection - Sets how the texture projects onto the surface.

Coordinate Space - Determines the coordinate space for the texture map. 

Use Rest Attribute - Prevents texture sliding, swimming, or distortion on animated and deforming meshes by locking coordinates to an base frame.

RGB Output - Outputs a color texture instead of the greyscale default.