Quote - i have two maps. the question is if i can combine the two maps in one material group. i made it easier for the sofware by offseting the UV

You can make them the same material group with the Grouping tool (Assign Material).

It will make whatever polys are selected into a new (or current) material group. The problem is, if you have seperate objects like that, the groups will be named the same, BUT you'd still have to select each prop 1st b4 assigning material.

You could always combine them in the Hierarcy window and spawn a prop from the combined pieces to get around that tho.

                                                                                                                    

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Octane Render

Wings 3D