The issue in the previous post aside, I have been working on some additions to this patch alongside the main BDcraft patch. I have assembled them here. This patch was tested against the 1.16.1 release, so I don't know if it will work the same for 1.15.
On top of the original 1.15 patch, this includes:
black sand and its sandstone variants
connected wood textures (these need to be redrawn; I couldn't find the edgeless versions of the textures in the normal BOP patch)
fence textures from 1.12 (I removed the unimplemented wood variants)
textures for origin grass (these are slightly modified versions of the old base grass texture; I couldn't use a redirect because they required color and the old assets in the main pack are gray)