If you wish to add materials to the database which do not come as standard with the model you can do it in the following way: Simply copy an existing material directory (say C:
ito) to a new directory (say C:
mynewmaterial). Then replace alpha.omat and n.omat with your data for the new material. There are two other files in each sub directory, namely fit.inp and mat.inp. The file fit.inp is needed can be ignored, the file mat.inp is defined as follows:
If you don't have data to hand for your material, but you do have a paper containing the data, you use the program Engauge Digitizer, written by Mark Mitchell https://github.com/markummitchell/engauge-digitizer to export data from publications. After you have finished updating the new material directory, whenever a new simulation is generated the new material files will automatically be copied into the active simulation directory ready for use.