Do you want seamless mapping, or seamless texturing? If it's former, then inevitably you will face with texture distortions and/or mirroring. If on the other hand you want seamless texturing, then there's several way to achieve that, from painting bespoke texture in programs like Substance Painter, to using advanced blending mapping like Corona's triplanar.
Thank you for your reply.
I want seamless texturing.
I think Corona Triplanar will not give good result.
Unfortunately, I am not using Substance Painter.
I thought there is a specific way inside 3DS Max to overcome this problem.
What people have used before corona Triplanar and SP to solve it inside MAX?