Houdini is a 3D animation application software developed by SideFX Software.
Sketchfab currently supports static FBX files exported from Houdini.
We don't yet support Houdini animations because it uses a point cache technique. Our team is currently working with SideFX Software to support animation and make the upload process easier.
Go to File → Export → FBX and choose the options below:
You can now upload this FBX to Sketchfab or compress it into a ZIP/RAR/7z archive to reduce the file size.