Blender 2,79

How convert materials from Blender Internal into Blender Cycles, properly ?

You can’t cleanly convert from one to the other. Their material definitions are completely different, BI being built on antiquated ad-hoc lighting and surfacing, while Cycles is based on real-world physical characteristics of materials and light sources. Simple things like color can be translated, but anything more complicated has no meaningful or defined common ground between the two systems.

there is a addon here (i have not tried it)

Thanks, but that addon isn’t there anymore

Thanks for your answer. It’s just that I bought I clone 7 for his animations but when I transfer a character from I clone to Blender
Cycles I lost all my materials, and that a pitty.