Most particle modules don’t support it including all the acceleration modules as far as I can tell. Well at least the option isn’t there when I right click the module in cascade.
Also for what I want to do, which is to make the level gravity affect the particles, this would mean that each particle systems would need its own blue print which I don’t really want to do.
I’ve managed to extend the particle simulation pixel shader by adding a shader parameter for passing the current world gravity in, and also added new module called WorldGravity whose details are passed to and stored on the GPU with the rest of the emitter info at build time. This allows me to update the gravity when I like and all particles with the WorldGravity module to be influence by it.