The only other one I’m aware of is “r.SkyLight.RealTimeReflectionCapture.TimeSlice”, by default it is set to 1 which makes for very choppy animation. If you reduce it to 0 it will capture every frame.
Unfortunately that’s all I’ve got. If you’re lucky, Seb will chime in with a more definitive answer on how to overcome this.
If you have fairly static clouds my advice would be to capture the scene using a capture cube actor then convert the render target to a static texture and just use that as your skylight texture. They won’t move, but the color/detail will be more accurate. When combined with SSR you can get really nice results this way, even if it is a little disorienting upon inspection.
Here’s a scene capture cube result combined with SSR:
Unfortunately the skylight will only take a static texture as input and I’m not entirely sure you can have a render target continuously update a static texture at runtime, so I don’t know that there is any way to get this to animate in real time.