Damien Pernuit

Hi,

That's unfortunately expected, as HAPI currently doesn't know how to translate COPernicus data.
Support for COPernicus nodes for HAPI/Unreal will be added in future versions of Houdini.

Hi,

Generic property attributes are more aimed towards random properties on objects that are not "manually" supported by the plugin.
For materials, you can just use the "unreal_material" attribute.

Prefixing with the material slot in square brackets is what we use when creating meshes - as one face can only have one material assigned, unreal_material has only one value that can be used to specify the material slot
ie s@unreal_material = "/Path/To/First/Mat/In/First/Slot"
s@unreal_material = "/Path/To/Second/Mat/In/Second/Slot"

With instances - you only have one "point" - so we need to use multiple attributes per material slot as we cannot give the unreal_material attribute multiple values.
In that case, you can just add the index of the material slot you want to change to the attribute name:

For example: SM_Pavement has two material slots
s@unreal_material0 = "/Path/To/First/Mat/In/First/Slot" (or s@unreal_material= XXXX)
s@unreal_material1 = "/Path/To/Second/Mat/In/Second/Slot"
etc..

Hi,

Here's a slightly more detailled step by step

1. Download UE's source code
2. Build Unreal Engine - without the HE plugin, make sure the engine works, and create a new project (c++)
3. Download and install Houdini (a production build recommended) - in your case 20.5.410
4. Download the plugin's source code for the version of H you installed on the git repo's release page
https://github.com/sideeffects/HoudiniEngineForUnreal/releases [github.com]
5. Extract the plugin's source to your project's plugin folder, ideally ending p with something like:
/MyAwesomeProject/Plugins/Runtime/HoudiniEngine
6. The final step is to build the plugin - since we don't provide linux binaries
Update your project's file so it detects the plugin (GenerateProjectFiles)
Build your project - this should build the Houdini Engine plugin with it.


And yes, you need to run source houdini_setup in Houdini before launching unreal, as it sets up the need variable to identify where the Houdini Libraries are.

Hopefully this helps!