09-30-2019, 08:08 PM
Yes, while the Shape list uses 0-based indices, particle Birth IDs are not guaranteed to be in any particular order, depending on your setup. For example, spawned particle birth IDs will generally be [parent birth ID + 1]. If you need to dial in the custom float values you can use a Script operator....for example, you could use it to assign the event index of particles to a channel, instead of Birth ID.