So far it appears that your suggestion worked out. Just so you know, you’re awesome. I’ve been struggling with this for two weeks. I wanted to make sure this concept would even work before I unwrap, texture, and stamp the cave detail; now, I can start the next step. I do have some weird artifacting at 1:11 of this video, but I’ll cross that bridge later. I also need to test this on the full cave so we’ll see how much I crash Unreal Engine with a cave that is about 15km.
Thanks again. Also, reading back on your first comment, I originally didn’t realize that you requested the .fbx, but later in the day when I re-read the post, I could not find where to upload the .fbx. I’m glad you were able to figure out the issue even without the original file.