Hi all, really hoping some one might be able to help me. Im trying to create an ocean ribbon spray effect coming of a boat foil, but struggling with the spawning side of things in Niagara. Just to give you the low down on how it’s put together - I have used some
Blueprint to scan a mesh cross section and generated uniformly distributed points around the shape, then stored the positions and normals of this points in a render target. I’ve then sampled the render target to create a 2D texture to store the positions and normals. Then created a Niagara system Data Tracker Emitter to sample the texture and extract the positions and normals and convert them to world space locations. I’ve then created a second ribbon water spray emitter (on GPU) and added a module Particle Attribute Reader to the emitter spawn section, to read from the Data Tracker Emitter. This is where I have become a little stuck, I can’t seem to find a way to get the ribbon water spray emitter to spawn a ribbon at each position . Just to give you some more visual context - I’m trying to achieve ocean spray spawning along the leading edge of a hydro foil under a boat. The spray should spawn as the foil goes up and down in the water (I am also sampling wave height and depth). I’m not too worried about wave heights at the moment as all of that side of things is working, the debug shows the data tracker emitter is generating all positions well. I just don’t know enough about Niagara to take those positions into the ribbon emitter and spawn at each point. I have started to generate a scratch pad script to use Particles. Position and Particles.Normal (read by the Particle attribute reader from the data tracker emitter) but haven’t got very far. Here are some images (please ignore the splash emitter, that one is working fine) which might help show what I’m trying to achieve. Hopefully you can see from the first image that the ribbon only spawns once in one place, it should be spawning at every position there is a little white boundary box along the leading edge of the T foil mesh 
……any help very much appreciated. 
