My favorite part of watching rain on a glass surface is when two raindrops connect with one another and merge together into a larger one. It would take a lot more work (more intensive computation based on the location of the drop, constant checking if another drop is on top of the target raindrop, etc...), but I'd _love_ to see two globules merge with one another. That would be incredible.
Well, it's your lucky day, because it does that. There's even a tiny bit of acceleration when it happens it seems. I was curious to see if anybody mentioned that in the comments actually.
I thought that was a very nice touch, since it would be easy to skip that.
If it does it, it doesn't do it very consistently as I was specifically looking for that effect only to be disappointed. That being said, this is still a really cool demo.
