I have a pixel detector with 500 + pixels, so I used parameterized volumes to produce them, since they are all identical, just shifted in the X and Y dimensions. However, in order to do this I have to create a mother volume to house all of these boxes. The mother volume and the pixels have the same z thickness.
My question is, if I have another material (in this case a silicone light guide) that is matched up with the face of the pixels/mother volume, does the mother volume have any effect on particles traversing the boundary between the light guide and the pixels? The particles are optical photons, and I have described a surface between the light guide and the pixel logical volume (which is the same logical volume for all of the pixels).
Does geant4 default to the most daughter volume for all processes?