Jun Ozaki demonstrated a few tools.
Watch Jun Ozaki transform Houdini's pig head with a "low-resolution" box, showcasing some custom voxelization tool that handles multiple materials and textures and seemingly allows you to adjust the voxel size.
The artist also demonstrated a glitch effect, experimenting with parameters to illustrate how the results change:
If you'd like to learn how to create Houdini magic with displacement effects directly in the viewport, check out tinybugbot's tips, using Houdini 20.5's new Copernicus, a 2D and 3D GPU image processing framework with nodes that allow real-time image manipulation within a 3D space:
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