[LayaAir 2.0]3D粒子现在支持Render Mesh吗?

在Unity 中预览粒子特效会报错 
 
 
Uncaught TypeError: Cannot read property 'mesh' of undefined
    at Function._getSprite3DHierarchyInnerUrls (laya.d3.js:31405)
    at Function._getSprite3DHierarchyInnerUrls (laya.d3.js:31462)
    at Loader._onHierarchylhLoaded (laya.d3.js:31477)
    at EventHandler.runWith (laya.core.js:999)
    at Loader.event (laya.core.js:1038)
    at Loader.complete (laya.core.js:18719)
    at Loader.onLoaded (laya.core.js:18675)
    at EventHandler.runWith (laya.core.js:997)
    at HttpRequest.event (laya.core.js:1038)
    at HttpRequest.complete (laya.core.js:18328)
 
我看文档支持mesh模式呀