2d particle system with custom sprite shape

I want to create a 2d particle system with shape set to a custom sprite ( it could be a player or obstacle ). I want it to emit in all directions. But i am unable to figure it out. I tried it with a diamond shape sprite. i provide this sprite in the shape property tab but it only emits from upper 3 sides and in just upper direction. I must be doing something wrong. Please someone tell me the right way to do this

I think sprite emitter shape is sth new in the latest Unity which I haven’t heard about until today, but ultimately the problem with sprite shape is the lack of vertex normal like mesh emitter shape. In that case you should create a new diamond mesh with some depth but uncapped like an uncapped cylinder, after changing the shape module mode to mesh shape mode, use “emit from faces” mode.