We have added (reinstated) perforated layers in transfer matrix, and transmission loss is more robust than before. I would still be careful using it for transmission loss, however.

We have also added visual guides to the Scattering calculation method. The green sphere is the surface along which receivers are located. The blue box indicates the extents of the Finite Volume Modelspace. The black box indicates Perfectly Matched Layers. The source is the location from which the test signal is emitted. For best results, keep the sample entirely below the green sphere, and do not have any geometry in the model except for the sample. DO NOT ENCLOSE THE MODEL. Let the algorithm decide how to represent the space around the sample. Have fun!