When you are using the director, remember that you can set the sky or environment for any Camera you shoot with. So if you are taking a 2D still, you can set the Sky or Environment to HDRI Sky to create a high dynamic range, or you can set it to something else. This keeps the amount of post effect work you do to a minimum, keeping your renders as fast as possible. If you are working on an HDR project however, you must use HDRI Sky.
If you are editing your project in iMovie, I would firstly like to point out, that the newer versions of iMovie have tons of new editing features that allow you to edit in a much more intuitive way than before. But if you are editing a project made before these features were available, and you would like to add effects to your clips, then look no further, because there 'HDRi Sky Override Collection' .
While I start building the collection using the technique described in the \"Getting Started Tutorial\" I recommend that you check out the Tutorials tab. There you will find tutorials on how to make a simple sky, and how to use the Sky Overrides and Lighting volumes to achieve a point light source on the horizon.
To help get you up and running, I created a Nuke tutorial utilizing the techniques in this collection. I would encourage you to check it out, and if you need any help, you can find me on FilmDoo. 7211a4ac4a