Stairs4D - automatic stairs generator in C4D -
Stairs4D is an application that generates based on parameters entered, different modes of stairs. 
Combining the various parameters and the various ways you can get various types of stairs. 
INFO: http://www.caleidos4d.it/plugin_stairs4d.htm
INFO: http://www.youtube.com/watch?v=iu-qLRx9T70&feature=youtu.be