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How to Limit Materials in GDL

Nader Belal
Hi there,

I was trying to limit the surfaces assigned to my object, by creating a material parameter in the parameter tab

So I tried to used "values" and "values{2}" GDL orders in the parameter script.

The Problem:

Values: only accept numerical values, which in this case it will be the surfaces' index numbers --- but surfaces' index number may have a different number each time it will be loaded to another computer.

Values{2}: I tried to assign a number and a description but couldn't

Is there a way to limit all the surface material in a material parameter so that any user can only see those selected materials ???
A good friend of mine have once told me that I´m so brute that I´m capable of creating a GDL script capable of creating GDLs.

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