Drowned Submarine

Description

this model created in blender , auto uv maping in 3D Coat and texture with Substance painter Friends : i'm new in substance painter , the 3D coat have option to merge multiple materials in one texture But i can find this option in Substance painter ! i exported this simple model with 21 texture! If anyone has a way to solve this problem, thank you for guiding me! ( Blend file is a gift to you ). https://www.artstation.com/payamtavakoli