The Fan Spiral procedural texture produces a spiral pattern of gradient shapes (figure 1).
Figure 1: The Fan Spiral texture applied to a Diffuse materialUsed for dull, non-reflecting materials or mesh emitters.
Time - Animates the fan spiral effect.
Spin - Specifies the amount of spin or rotation for the fan gradients.
Arc Count - Determines the number of fan gradients.
UV Transform - Positions, scales, and rotates the surface texture.
Projection - Sets how the texture projects onto the surface.