I finally found the time to finish the project I started during the Environments in Houdini course on Rebelway a few years ago. It was one of the first full CG environments I created at the time using Houdini, I've only improved the lighting and clouds now. Almost everything is procedurally generated including the castle, most of the vegetation done in Speedtree, rendered in Arnold. I do hope you enjoy the result.
P.S. Don't forget to turn on the sound to check out the soundtrack I recorded for the video.