I was about to creat a macro (VB based) to import material from matweb.com to inventor 2012 pro. I thought some people might have already done some stuff in this regard, I appreciate if you share your experience with me.
I have not an information on this question. But API provides Document.Materials which could add new material Materials.Add. And the Material object has some properties, including RenderStyle. I think you may need to create a RenderStyle, the Material with the parameters from the material from matweb.com