I can not set a negative gravity on Auxilary particles. Is there a way to do this? I can set gravity to negative values for the primary particle system but not the Aux.
I need to do this so that I can fake a reflection of Particular fireworks onto a ground plane. I want to have one layer shoot up and the second layer invert the movement vertically, so it looks like a reflection on the ground. I know i could fake a reflection in 2D by precomping, and setting the vertical scale to -100, but I need to fly a 3D camera through the fireworks. I can get the movement mirrored, but the gravity of the aux particles always goes down. For it to look right, the 'reflected' particles need to travel upwards instead of down.