求翻译：- The background picture is located under UIGluesMainMenuMainMenu3d_expMainMenu.tga. To make your own background picture, you can simply replace this tga file with any other tga file. The picture will be stretched to fit the screen so any size will do, the higher resolution the better quality - The picture must have an alfa channel, so if you convert from .jpg just add a completely white channel called alfa是什么意思？

待解决 悬赏分：1 - 离问题结束还有