Thank you for comment. But I can't solve problem..

I try set MIN and MAG to solve problems. but can't.

Change all parameters that

Parameters(MIN)
GL_NEAREST (MAG Only)
GL_LINEAR ...

Actually, I just use sample.

so I can't understand and I don't know what to do..

So Please show me some example code...I beg you.

I cant use urls.. so. please show this url.

=> cfile296.uf.daum.net/image/1521CD4150ED17DB0D91C3

I want to show Image.

When using "glBlendFunc()", one image is well, but two or over have a problem.

There are unprepared border-line Alpha value . (please see attachment file)

This is key...