The CubicChunk mod allows for world infinite in all directions. OpenTerrainGenerator seems to be a perfect choice as a terrain generator.

Hey @sirati97, thanks for the feedback. Feel free to start a discussion about this on the OTG Discord at #openterraingen. Once CubicChunks is more mature and OTG is in better shape, I may have time to look at things like this. Lots of other priorities atm though.