I need to use an animated map to distribute the particles over a surface. Here’s a pic of what I have so far:
I need to make particles disappear slowly (to simulate deforestation on the globe), so I was trying to use an animated map to do this, but they do not disappear. I set the Density by Material in the Position Object node to use the animated map, but nothing happens.
I made a little search, and someone wrote that you need to have a Speed by Surface node set to Speed by Material / Grayscale Multiplier for the effect to work, but it does not work for me either.
Any suggestion to fix this, or maybe another efficient way to accomplish this effect?