Dynamic Weather in UE4?

I am creating a multiplayer level in UE4 and I’m just wondering if it is possible to add dynamic weather, for example sometimes the weather gets more severe at randome times including sound and tree movement. Is this possible in UE4? Because it’s a muliplayer level I want the weather to change at random times every time the map is loaded.
Any tips would be great as I have not found any tutorials.

Thanks :slight_smile:

I have no idea how to do such a thing my self but i’ve seen it done here:

You can probably use it to get a starting point.

The solus project has dynamic weather. The web page below owned by its creator has a link (somewhere—it’s been a while since I downloaded) to a sample UE4 project with weather blueprints.

Many ways to approach this. I’d suggest firstly looking into the material parameter collections as they are a great way to drive an unlimited number of materials with the same parameters without ticking them or making MIDs. Then it should be pretty easy to drive those parameters in the level blueprint. you could even make it a whether BP that the level just helps communicate with.

You could basically assign a number of states. Lets say for now the states are Clear, light rain, storm, or 0, 1, 2. You could have on levelstart a random float between 0 and 3 generated and then stagger a few branches to get a switch on int behavior. If < 1, state = Clear; elseif < 2 state = light rain; elseish < 3 state = storm. This is just one of many ways to start thinking about the problem.

You could make the state actually a float, and use the frac part of the value to drive something like the intensity which could be intepreted as anything by the various whether sub systems. Ie, the amount of raindrops per texture could increase as state went from 2 to 3.

^ sounds like fun :slight_smile: