![Use vertex color as input to Bitmap controller](http://torabiarchitect.com/parametric-array/wp-content/uploads/2012/10/vertex-paint-574x268.jpg)
Use vertex color as input to Bitmap controller
In this tutorial I used a “Vertex Paint” modifier to paint on the surface and using the colors of the surface in a bitmap controller I modified a parameter of parametric array.
This approach works on 1D array while for 2D array you need to do some extra works to achieve the same effect.