Instancing Point Cloud

@Mugen87 I have just created examples, could you take a look? thanks a lot!

without instancing: https://jsfiddle.net/08ysb1g4/
with instancing (not working): https://jsfiddle.net/vf29uc86/

I was basically trying to create the 2 exact copies of the point cloud with certain offset (-2000, 0, 0) and (2000, 0, 0). it doesn’t give me any error, but just not showing anything