Google Card Board, Very Low Quality Textures

Hi guys,
I trying to make my first VR project but every thing works fine on my phone but I’ve problem in texture quality, This is screenshot from my Phone (HTC One M8) :

Also i trying to make a water like Sun Temple project but it was a full black.

Regards
Vahid

I found Solution, Thanks to islipaway,

Problem was from Material, This is new material :

61516cac44f6ff375a3bc946fc8503f05cfaf9a9.jpeg