Most of today's crop is hashtag-laden Shorts and filament promos, but this pavilion feature from IAAC (Institute for Advanced Architecture of Catalonia) actually earns its runtime. The project explores what happens when you feed a large-format robotic extruder a mixture of raw earth, clay, and natural stabilizers instead of concrete or polymer — producing a curved, self-supporting pavilion that could theoretically be dismantled and returned to the soil.

What makes it worth watching for makers is the process detail: you can see the toolpath strategy for a non-uniform, low-strength material, how the walls thicken and taper to manage compressive loads without rebar, and how the print speed has to be tuned around the drying rate of the earth mix. It's a useful counterpoint to plastic-extrusion FDM — the fundamentals of layer adhesion, overhang angles, and print orientation still apply, just at a very different scale and with very different failure modes.

There's also a nice sustainability angle worth chewing on: cement production is roughly 8% of global CO₂ emissions, and cob and rammed earth construction have been used for millennia. Marrying those ancient material sciences with modern robotic path planning is one of the more genuinely interesting directions in additive manufacturing right now, and this short pavilion tour makes the idea tangible.