Or do the following:
Create hierarchy Transformation between your 0prod hierarchy Data Source and 0MATERIAL.
In Start routine after intervals method (if any) include this code:
data: wa_package like line of SOURCE_PACKAGE_3,
RESULT_PACKAGE like SOURCE_PACKAGE_3.
LOOP AT SOURCE_PACKAGE_3 INTO wa_package.
IF wa_package-IOBJNM <> '0HIER_NODE'.
wa_package-IOBJNM = '0MATERIAL'.
ENDIF.
APPEND wa_package TO RESULT_PACKAGE.
ENDLOOP.
SOURCE_PACKAGE_3 = RESULT_PACKAGE.
This way the loaded hierarchy will mimic the hierarchy of 0MATERIAL and you will be able to load it to BPC (provided you also loading 0PROD master data to 0MATERIAL).