This is a pack of five custom nodes built around Substance Designer's Flood Fill. The Flood Fill to Random Grayscale+, Random Color+ and Gradient+ nodes can accomplish the same things as their out-of-the-box counterparts, but offer the user significantly more control. The Flood Fill to Alignment (Color and Grayscale) node has no built-in analog and places single shapes regardless of their initial positioning.
Available on Gumroad:
https://gum.co/LkHOd
and Substance Share (not kept up to date) :
https://share.allegorithmic.com/libraries/4102