The mapper may have been used in the diffusion bundle (still to discuss) and in tutorial step 3.
The mapper is neither really tested nor maintained nor used since multiple years.
Usually the GPUVolumeMapper3D mapper from the MitkMapperExt module is used.
Tutorial step 3 already works with the standard GPUVolumeMapper3D by simply adding a dependancy to the MitkIOExt module.
@ Jan, Caspar: Could you please comment on the usage of this Mapper in DiffusionIO/mitkQuantificationObjectFactory?