各位高手请教,我用Knoll Light Factory光效特技做出来的光效怎么会产生斑纹?如图:[img]http://<a href="http://www.flickr.com/photos/68785693@N05/6298899551/" title="Flickr 上 Huanghegudu 的 1"><img src="http://farm7.static.flickr.com/6111/6298899551_ecfa95826f_z.jpg" width="640" height="320" alt="1"></a>[/img]