Question Print photo over a mesh

Hi everyone,
I am developing an AR app with AR Foundation, one oh their features is a animation trigger by a image target in a wall:
When user detect this image target in his smartphone camera the app show the next animation:



Before init animation I need to take a photo and then print it over the mesh of each piece, the target is set the real wall material over my breakable wall.

I had tried to use decals but is useless because when the pieces of the wall falls, the decal position is fixed and the texture is deformed in my pieces. If I try to joint a decal for each piece, all decals affects over the other pieces.(Example with a generic decal:
)

If I try to joint a decal for each piece, all decals affects to the other pieces.

I just only to print my photo over each piece and then fixed to each piece. And I dont know how print over a mesh.