This Demonstration shows a projection to three-dimensional space of some particular quaternion Julia sets, which are those sets of points in quarternion space that remain bounded after repeatedly applying the quadratic function , where is the quaternion product and is a constant.

The Demonstration renders a case selected from the top menu, some cases in quaternion space and others that show classical Julia set forms from degenerate (two-dimensional) complex space that project as extrusions. Each case is distinguished by the quaternion constant and the coordinate of the plane onto which the set is projected

The model settings section permits selection of the case, the number of recursions to be tried, and the threshold against which the norm of the recursion result is compared. The image settings include the number of spatial sampling points and whether axes should appear.