Hi Roasty, As Loren said, if you purchased the pack on Roll20 it should appear in your library in-game, no need to re-upload. You need to go to Art Library > Premium Assets > Marketplace Purchases > "weather pack's name". You should be able to drag and drop the effects into the tabletop from there. Keep in mind that when you drop the image into the map it will probably occupy a single square/tile (and with weather effects it might be hard to see at such a small scale), so you'll need to select it and resize as needed. Hope that helps!