I'm trying to add some math to a shader network that I'm building. I want to take a numeric output from a node and pipe it through the equation f(x) = -2x^3 + 3x^2 (this is sometimes called the smooth step equation). While I could do this by dragging five Math nodes into the graph, this seems like a messy way to solve this.

Is there an easier way to add an equation like this to a graph? Does Blender already have a smooth step node I could just use?

  • $\begingroup$ I just found the node grouping tools that the shader network provides. This lets me hide all of those math nodes inside of a single node. $\endgroup$ – kitfox Sep 30 '19 at 2:40

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