Using BoP and Natura together, there's a small issue.

Natura adds a lot of Nether stuff, however, it also adds Heat Sand and Tainted Soil to landscape generation.

Thankfully you can turn it off in Natura's config via B:"Override Nether"=false , but... BoP seems to ignore it willingly and still generate Heat Sand and Tainted Soil.

In TinkerConstruct's IRC mdiyo told me it might be on BoP side. So, just putting it out there.