Here is the signature Houdini 20 eagle. In this download are 2 main files. The first is the creation of base feathers, and placement of them. This is in the eagle_feathercreation.hip, and then the eagle_render.hip is where the various caches of feather patches are assembled and brought into LOPs for rendering in Karma XPU or CPU. There are also cameras and lights included, which were used for the creation of renders for the Houdini 20 release marketing materials. Feel free to experiment and create your own.
Original HDRIs used for the creation of renders seen in the Houdini 20 Sneak Peek are not distributable and therefore not included in the download.