Some leaves from Sengoku Jidai don’t wave because they aren’t defined in BSL’s internal configuration. If you want all leaves to wave properly, follow these steps:

1º Open BSL_v10.1.1.zip using a tool like 7-Zip or WinRAR

2º Navigate to the shaders folder inside the archive

3º Drag and drop the provided block.properties file into this folder

4º Replace the existing file when prompted

After replacing it, all supported leaves should wave correctly.

Note: compat for other shaders is not included.