What method are you using for the special effects?
I created a basic city-scape in Source Filmmaker, I set up lighting, then I set up cameras to then create 4k images.
I take those images into Hitfilm then I composite everything. The clouds are from an image of a sunset I took last year.
I know for a fact that there are better, far more efficient ways of achieving similar effects, but I am content with my current methods.