+"#ifdef USESKELETAL\n",
+"# ifdef GL_ARB_uniform_buffer_object\n",
+"# extension GL_ARB_uniform_buffer_object : enable\n",
+"# endif\n",
+"#endif\n",
+"\n",
+"#ifdef USESHADOWMAP2D\n",
+"# ifdef GL_EXT_gpu_shader4\n",
+"# extension GL_EXT_gpu_shader4 : enable\n",
+"# endif\n",
+"# ifdef GL_ARB_texture_gather\n",
+"# extension GL_ARB_texture_gather : enable\n",
+"# else\n",
+"# ifdef GL_AMD_texture_texture4\n",
+"# extension GL_AMD_texture_texture4 : enable\n",
+"# endif\n",
+"# endif\n",
+"#endif\n",
+"\n",