How do instance an object Alt-D but have unique materials on each?

render time went to 12 hrs with duplicates because of high poly counts, but down to 10 mins if i used ALT +D. only problem is it links the material data as well but i need separate materials.

Hi @Thesonofhendrix
If you select one of the objects you duplicated with Alt+D, then go to the properties panel > Material Tab where you select under the Link-dropdown: Object. Now the material is linked to the object and not the object data.

MaterialObject

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