Hi,
Storm keyframes are separate to rain. Rain is achieved in 3D cloud keyframes. Simply make one, then make sure “rain-snow” is set to 0 (or 1 for snow) and “strength” is set to something reasonably high. You may also need to increase the cloudiness of the keyframe to see the rain fall.
You can check out our docs : http://docs.simul.co/ which will hopefully help you. We’re still improving them and adding to them (a FAQ/Troubleshooting page is on the way) so feel free to offer any suggestions and/or post in for help if there’s something you can’t see there
It seems like ue4 didn’t imported the ripples… Is it also possible to make the rain colide? Or making splashes on the ground? Seems like the rain is going trough the wall ^^