SetBackgroundMaterial
=====================
```{function}  SetBackgroundMaterial(CSX, varargin))
```
Full definition:
```{code-block} matlab
function CSX = SetBackgroundMaterial(CSX, varargin))
```

Set the background material properties

variable arguments:
- 'Epsilon'       : background rel. electric permittivity (default 1)
- 'Kappa'         : background electric conductivity (default 0)
- 'Mue'           : background rel. magnetic permeability (default 1) 

example:

    CSX = InitCSX();
    CSX = SetBackgroundMaterial(CSX, 'Epsilon', 4)

See also InitCSX



-----------------------
author: Thorsten Liebig (c) 2013