Procedural Scattering : Houdini to Unreal workflow

Hi all,
This is a diorama project I developed to present scattering objects by following Houdini to Unreal workflow. Here I made a scattering hda in Houdini and import it in Unreal and then by using it I scattered rocks, grass, coins and bones inside the engine. The lootbox and the cactus models are downloaded from Sketchfab. The rest of models are made by my own in Maya (Zbrush for the sculpted rocks) and textured with Substance Painter. Also the catapult model is rigged and ready for being animated. By the way, the sand material is made with Substance Designer. I added a wip speed recording below.
Thanks for watching!