Le mieux est de passer par l´alpha test :
glEnable(GL_TEXTURE_2D);
Color3D(Color(1.0,1.0,1.0));
glAlphaFunc(GL_GREATER,0.99);
glEnable(GL_ALPHA_TEST);
if ( enableBind) glBindTexture(GL_TEXTURE_2D,texture[0]);
glBegin(GL_QUADS);
for ( int i = 0; i < 8; i++)
{
Texture2D(coords[i]);
Vertex3D(dots[i]);
}
glEnd();
glDisable(GL_ALPHA_TEST);