playing with mirrors question –
The mirrors, would be expensive I agree. However, there are alternatives to mirrors for instance polished aluminium.The two-way mirrors can be made out of film and placed on thin sheets of plexiglass. When it comes to the spinning motors and redesigning of the vortex, we need to keep in mind that spinning tunnel made of a mirror wont look to be spinning at all when your inside it. At most, since the mirror is concave it will appear to make images 3D and even more likely distorted. But it will not cause reflections to rotate, so there would be no need for a motor to spin it.
If we wanted to recreate the vortex using mirrors (which I don't advise) the inner tunnel would need to move and not spin. For instance the back would need to move toward one side of the outer mirror while the front would move toward the opposite side. Even moving a mirror tunnel slowly would cause your reflection to move from back of the tube to the front quickly. Not too scary but sounds trippy.
I sure wish someone would gather up a model and share the results here.