Hi,
It is a bit unclear to me how licensing for Houdini Engine works.

If I'm the only one who uses SideFX Houdini itself and I want to share HDA's that I'm making to designers who do not have Houdini installed - does it mean that those designers would need to buy Houdini Engine if they want to use it?

If the designers are going to modify the parms and recook the HDA, then yes, they will need a Houdini Engine license. For our shipped plugins, you can create the HDAs in the relevant application (unity, unreal, maya, max), and save it as part of the scene. Then others who not have Houdini Engine can still see the generated output (geometry, etc), but won't be able to change parms or cook it.

Thanks. Now it is clear.