At first I have to mention, that you cannot calculate a 3D transformation for all fractal types. For some types this simply doesn't make sense. A first presupposition is that the function which calculates the color for any complex number has to be a continous function to produce reasonable results. Fractal type '24 bit Julia', '24 bit Mandel', 'Plasma' and 'Lyapunov Space' fulfill this presupposition. Other types may produce some results, due to the non continous function there of course are sudden 'jumps' in the height field, which can't be avoided and really look annoying.
Lets make an example.
At first we calculate the image. After having calculated the flat 2D image of the fractal, the 3D transformation is performed. So you have to wait some time until you see a 3D image. Well, the main reason is that ChaosPro has to transform an iteration value to a height. But that would almost never produce any reasonable result.