Photo credit: Iñigo Ezcurdia 2025
Here’s a first look at FlexiVol, an innovative volumetric display that uses an elastic diffuser to let you reach right into it. Unlike traditional volumetric displays, which render true 3D graphics without requiring headsets or glasses but use rigid optical diffusers that prevent direct interaction, FlexiVol introduces this new novel approach.
Making FlexiVol meant trying out different materials for its diffuser, figuring out how to get good visuals while keeping it strong and flexible. The team also fixed some stretchy distortions in the 3D content caused by the bouncy diffuser. This improvement makes it easier to add all sorts of gestures and actions, so using it feels simple and natural.
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They did a test with people comparing FlexiVol’s hands-on way of interacting to a less direct way (using a 3D mouse). They found that stuff like picking things, lining them up, and following outlines was quicker and more accurate with FlexiVol’s direct approach. It could be used for things like virtual pets or shaping landscapes, showing how it lets you play with 3D stuff in a cool, touchable way.
The elastic diffuser isn’t just a flat, still object—it stretches right as you touch it. That lets the screen change with your fingers, giving you a lively, almost touchable response without any gloves or gadgets. The team made smart algorithms to follow and fix the wobbles, keeping the 3D pictures clear even while the surface shifts.
Commercial prototypes of volumetric displays already exist, such as those from Voxon Photonics or Brightvox Inc., but none allow for direct interaction with the holograms…being able to insert our hands to grab and drag virtual objects. We are used to direct interaction with our phones, where we tap a button or drag a document directly with our finger on the screen – it is natural and intuitive for humans. This project enables us to use this natural interaction with 3D graphics to leverage our innate abilities of 3D vision and manipulation,” said Asier Marzo, the lead researcher.
[Source]
