[]图片加载失败是什么原因，我该怎么让美术改图

代码：var handani = new Laya.Animation()
handani.loadImages(["fresh/hand1.png","fresh/hand2.png"],"handani")
handani.frames = ["fresh/hand1.png","fresh/hand2.png"]
handani.interval = 150
handani.zOrder = 10000
handani.pos(point.x+50,point.y+30)
MainUI.Root.addChild(handani)
handani.play(0,true,"handani")
控制台：
[warn]Retry to load: fresh/hand1.png
[warn]Retry to load: fresh/hand2.png
[error]Failed to load: fresh/hand1.png
[error]Failed to load: fresh/hand2.png
有哪些美术方面的原因会导致图片加载失败，同样的代码其他动画没问题，只有这个动画有问题，基本确定是美术的事，但是怎么让美术改