As shown in attached pictures, when a leaf block from your mod has its horizontal faces blocked, the textures become blacked out, where it should normally be transparent. This one happens when the Leaf Culling Mode is set to 'Solid Aggressive', but the textures look fine in the 'Solid', 'Hollow', and 'None' settings. The issue is consistent with every leaf block from Atmospheric and Neapolitan, and potentially from other mods if they add leaf blocks.