This is an endless loop of a cylindrical sector going around in a metallic cage made of two parts.
The animation of the blue part was difficult as it had to match the radii of both metallic parts.
Seamlessly stitching the loop was also a challenge as the first and last frame of the animation need to be the same. Lots of values had to be tweaked in order to get a seamless result.
All modelling, animation and rendering was done in Blender and Eevee was the rendering engine used. The sound design was also tricky as the *pop* sound had to perfectly coincide with the exact frame and the continuous rolling sound in the background had to be made seamless just like the animation itself.
A whole we...