Sorry guys, I should have responded before. We have updated the tutorial video and files for Houdini 18, and will be uploading them soon. That should fix most of the issues you are coming across. Will update this thread when its in.

In the mean time, I've attached the updated section 6 files that work with Houdini 18.0.460 (and newer) to this post. Let me know otherwise.

I am having a similar problem.
When I generate the working itens in Unity each terrain that is splitted loses its terrain layers. What can I do?

Just to add another way to do this is to use a For-Loop. It's the same principle as mentioned before but to me reads better. You set iterations similar to what Indie Pixel did.

One very important thing to making this work though is to make sure you're naming your files with `@pdg_index` or `@pdg_name.` The better one being pdg_index as it just gives a clean 0, 1, 2, etc count to your filename.