We are living in a post-WIMP world. Indeed, more and more users access information, communicate and operate interactive surfaces foregoing the still common mouse and keyboard of yonder. However, no matter how powerful or elegant the new mobile devices are, it is the user interface that ultimately governs how successful new devices or systems will be. We will look at interactive systems and their applications to virtual environments and shape modeling. Multimodal user interfaces currently engage people using images, video and sound but virtual environments not only involve interactive 3D graphics, but further need to take more advantage of our senses through spatial audio, haptics and many other novel and exciting communication modalities. I will address these issues in the context of current research and foreseeable future developments in shape exploration and modeling.