I had problems building the code and wrote up the process in case it helps others or the authors... Attaching the text file I wrote up for the process in 1.12/eclipse oxygen.

OpenTerrainGenerator -COMPILING addendum.txt

Hey frakier, thanks for that! I'm currently cleaning up the repo, fixing the build scripts and adding some documentation. Will make sure everything is included and documented for v7.

If things are working correctly btw all you should need to do is /gradle setupdecompworkspace, /gradle eclipse and maybe a /gradle build. Then load up eclipse, add the projects, create a run configuration with --username and --password, and run. That's for Forge in any case.

Have added the META-INF.jar that was missing and reworked some gradle files and dependencies. Hopefully things should work out of the box now, still need to test on a clean system.

I'll see if I can add your eclipse instructions to the forge setup readme later, thanks!

/gradle setupdecompworkspace, /gradle eclipse work for me sometimes and then sometimes not, more to do with my inexperience than anything else. When I have problems I find writing it all up helps, especially if I can use the same information in other areas. Thanks, I'll Close Now.