sokolov3d
nice work!
This PBR seamless material created by Substance Designer.
Files = Textures(2K,4K) .png + 3dMax (Vray, Corona) + Sbsar + mtl + fbx
Textures= basecolor, ambientocclusion, height, normal, roughness.
Workflow = metallic-roughness + specular-glossiness
Normal = OpenGL