Hey Vaelek, I have played with the light module in the Lightning emitters, and the problem is these lights are not casting shadows. I also cannot find an option to make them cast shadows within cascade. I think the best alternative would be to make the particle system a blueprint and spawn a dynamic point light via the blueprint rather than the Cascade particle system. I have wanted to turn the weather effects into blueprints for more flexibility and better usability for awhile now, so hopefully I will be given the time to do so. I will pitch it to the up and ups today. 