Affected Mod Versions:

(Please list other mods and their versions if you feel they are relevant to this issue. i.e. Biomes O' Plenty)

• Forge version:1.10.2-12.18.3.2511
• RTG version:1.10.2-4.2.0.0-snapshot-5
• HeatAndClimateLib:1.10.2-2.2.2(1.6.x is the same)

Issue Description:

(Please provide screenshots if neccessary/possible. Images can be dragged & dropped into this window.)

Steps to reproduce the issue: (If it's easily reproducible.)

1.install the two mods mentioned,configs above
2.create a new rtg world
3.gamemode 3 and dive down

Extra Information:

• If you have a crashlog, please provide it by using http://pastebin.com/ or https://gist.github.com/
• You can also provide your client log file: /.minecraft/logs/fml-client-latest.log
• If your client log file is too big for pastebin you can use https://gist.github.com/

extra links,to introduce what RTG is:
https://github.com/Team-RTG/Realistic-Terrain-Generation
Apologize for my bad english.I can't speak Japanese.
(Thanks to ctrl+c & ctrl+v)

Please change the config file. It can be changed arbitrarily by the user.
Open "config \ defeatedcrow \ climate \ core.cfg" file.
Next, set "Enable Water Caves" to "false".
This flag stops modification of underground generation by HaC.

Thanks!It really works!