Winter to Autumn

In this scene we can see a transition from Winter to Autumn, but actually, I changed Autumn to Winter. I learned from Ignace Aleya. I'll put his tutorial below. I like this technique, because I didn't need to use masks or tracking the snow, what would consume too much time!

Here the snow composition:

And the original scene:

Plus, I didn't need to use any extra plug-in for the snow. I just use the After Effects CC Particle World for the falling snow.

Well, the effect could had just finished like this, but to make a bit more fun, I add a short animation with a snow man. In this case I had to use E3D.

And Particular to make the transition. Not compulsory, but just an option ^^

And, here is the tutorial: