this is the very first try and it works well for me.
If someone need it, you may download from Online package search:"RevitScatterForOctaneRender"through Dynamo in Revit.
Before this, I used some other softwares like phantom scatter or forestpack etc, they are all good software, but they are all out of revit,
I was suffering exporting importing back and forth which is not very convinient.
Now we can do it within revit quick and simple.
