# How to create a Sierpinski Dodecahedron fractal

I can create a Menger sponge fractal using geometry nodes.

See Blender file below:

Now I'm trying to create a Sierpinski Dodecahedron

I tried to replace the cube node with a Dodecahedron created as an object but that didn't work

The goal is to create the Sierpinski Dodecahedron fractal that can be sliced into several sections and 3D printed out.

• Have been discussing this with @lemon just recently .. have got this far.. but running into floating-point errors in the dodecahedral case. Got to get the maths right for the scaling factor. And I know, on my machine, if I go one level further I will crash Nov 20 '21 at 20:13

• that gives the scale factor for instances in the corners: 1/(2+phi) I've still got to work out the factor for instances on the corners? I'll get to it.. my neurons aren't firing atm. Need coffee. Nov 21 '21 at 10:05