Corrected information on dielectric smoothing for the #geometry_objects_read command.

docs/source/input.rst

@@ -606,7 +606,7 @@ Allows you to insert pre-defined geometry into a model. The geometry is specifie
 
 .. code-block:: none
 
-    #geometry_objects_read: f1 f2 f3 file1 file2 [c1]
+    #geometry_objects_read: f1 f2 f3 file1 file2
 
 * ``f1 f2 f3`` are the lower left (x,y,z) coordinates in the domain where the lower left corner of the geometry array should be placed.
 * ``file1`` is the path to and filename of the HDF5 file that contains an integer array which defines the geometry.
@@ -620,6 +620,7 @@ Allows you to insert pre-defined geometry into a model. The geometry is specifie
     * You can use an integer of -1 in the HDF5 file to indicate not to build any material at that location, i.e. whatever material is already in the model at that location.
     * The spatial resolution of the geometry objects must match the spatial resolution defined in the model.
     * The spatial resolution must be specified as a root attribute of the HDF5 file with the name ``dx, dy, dz`` equal to a tuple of floats, e.g. (0.002, 0.002, 0.002)
+    * If the geometry objects being imported were originally generated using gprMax, i.e. exported using #geometry_objects_write, then you can use dielectric smoothing as you like when generating the original geometry objects. However, if the geometry objects being imported were generated by an external method then dielectric smoothing will not take place.
 
 For example, to insert a 2x2x2mm^3 AustinMan model with the lower left corner 40mm from the origin of the domain, and using disperive material properties use ``#geometry_objects_read: 0.04 0.04 0.04 ../user_libs/AustinManWoman/AustinMan_v2.3_2x2x2.h5 ../user_libs/AustinManWoman/AustinManWoman_materials_dispersive.txt``
 
@@ -934,4 +935,3 @@ The parameters will be applied to all slabs of the PML that are switched on.
 
 .. tip::
     ``forward`` direction implies minimum parameter value at the inner boundary of the PML and maximum parameter value at the edge of computational domain, ``reverse`` is the opposite.
-