关于渲染的问题？玻璃没有折射？

eric

经过渲染的玻璃没有折射的效果，大家看看应该怎样设置才能有折射的效果。
是否pro/e的渲染不能体现折射。
<img src="attachments/dvbbs/2003101011152638038.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2003101011152638038.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

lxd001

我选择其他的选项好象效果不明显啊

dahe1hao

具体一点