=== Grouping Objects By Surface Type ===
EM.Illumina organizes physical objects by their surface type. Any object in EM.Illumina is assumed to be made of one of the three surface types(click on each type to learn more about it):
# '''[[Defining_Materials_in_EM.Cube#Perfect_Electric_Conductors_.26_Metal_Traces | Perfect Electric Conductor (PEC) Surface]]'''