Affected Mod Versions:

• RTG version: 1.1.1
• Biomes O' Plenty (latest version for 1.7.10/1.8.9)

Issue Description:

• Bug 1:
  
  BOP's Marsh biome tends to create a massive load of undergrounds lakes which causes your FPS to drop down to 0 when near.
• Bug 2:
  
  
  
  Horses tend to be partly stuck in the terrain which causes them to suffocate.

BOP's Marsh biome tends to create a massive load of undergrounds lakes which causes your FPS to drop down to 0 when near.

It's unlikely this has anything to do with RTG created lakes. BoP has no affect on how RTG generates them and as far as I know we don't do anything special with lakes in BoP biomes. @whichonespink44 would know better than me though.

Horses tend to be partly stuck in the terrain which causes them to suffocate.

This is a vanilla bug that has been known for quite a long time.

The excessive amount of underground lakes is caused by BOP's decorations, so there isn't anything RTG can do about this. Sometimes it's possible for RTG to manually decorate a mod biome itself, but in the case of BOP's Marsh, it would be too complicated because its surface lake generation is coupled with its underground lake generation.

@Quizer9O8 If the Marsh biome is too much of a problem, the only thing we can recommend is disabling it.