I just generated a world and found this. Seed = ni

Forge 12.16.0.1859,
RTG-1.9-0.0.5

please open issues in 1.9 at the 1.9 repo: https://github.com/Team-RTG/1.9-Realistic-Terrain-Generation/issues
Other than that, that is extremely weird. It seems the chunks have been offset, but only for the river. Might be a forge bug, i dont think 0.0.5 was supposed to even run on forge 1859.

0.0.5 was built with Forge 12.16.0.1830.. I don't think anything has changed since then with respect to world gen.

That looks like the result of my first round of patching the river system to deal with double points. It should have been fixed in the 1.7.10 version for a while.

I just found an issue that can cause this kind of behavior. When a noise function gets called on x/wavelength and x is an integer there are sometimes rounding problems.

Moved to 1.9 issue tracker: https://github.com/Team-RTG/1.9-Realistic-Terrain-Generation/issues/72