The widely used projector-based display system has the limitation that the image can only be projected on 2D physical space. It means that the audience can only passively experience the visual contents since the individual audience cannot choose the viewing angle. A volumetric display can become an alternative display that allows more active audience participation since it allows viewers to choose the viewing angle independently from other viewers participating at the same time. Medialamp-Echolu minari is a LED-based volumetric 3D display that has several distinct features. Firstly, it is a very large outdoor volumetric display of which height is over 4 meters and that comprises over 10,000 LEDs. In order to make the structure of the display less revealed, we used a more irregular cylindrical coordinates based LED layout instead of the widely used regular cartesian coordinates based layout. The frame was also designed so that it can provide durability and easy maintenance since it is a permanent outdoor installation. For creating digital volume contents displayed in the hardware, we employed physics-based 3D computer simulations and also the voxel-sampling that takes the LED layouts into account. Both contributed to making the most of the low-resolution LED display for creating realistic visual contents.