I try to use filler to place some carpenter's blocks.Although the blocks can be place normally...but it places silly blocks--the carpenter block placed by filler is different from that placed by hand,it'can be coverd with any other block like that placed by hand.

nothing we can do about that, only the person who placed the carpenter's block can cover it with another block, BC is using it's fake player to place down blocks

So,i tell the carpenter's author.Maybe he can reslove.

depends, i think it's a design choise to only allow the player who placed it to cover a block

o...i see.
I suddenly have idea about filler.Can filler display the shape profile in the world before building?
Just like the building guider in the openblocks mod.