The problem still their +_+... I used Bevel tool before I applied any shaders... this problem show up after I entered the texture's working period... so I have followed your advised..by applying Lambert1 and then remapping the texture but it still didn't work

https://www.esnips.com/doc/5317be3a-5...3/errorTexture
<====== this is the thing which still happened, at left, the picture show normal texture displayed....at right, the picture show error displayed texture after turning some camera's angle.

even worse, when I try to seperate the object and then recombine it.....I found Fatal error message caused by trying to overwrite some of working registry... and certainly, Maya closed it self...... T-T