+#ifdef GL_EXT_texture_lod_bias
+ glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
+#endif
+
+#if 0
+#ifdef GL_EXT_texture_filter_anisotropic
+ float max_anisotropy;
+ glGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &max_anisotropy );
+ glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
+ max_anisotropy );
+ cout << "Max anisotropy = " << max_anisotropy << endl;
+#endif
+#endif
+