I've been rendering some exterior night scenes in a snowy landscape. Most of the time they are coming out very well. But other times I get these strange "blotches" of light. I realize this often happens when a material is used as a light emitter, but in this case all of the exterior lighting is done by Enscape lighting objects (and the moon and stars). The interior lighting behind the windows is a mix of emitters and Enscape lights.
I am using the following Enscape settings (only the ones that seem relevant):
Auto Exposure (81% Brightness)
Rendering Quality Ultra (Capture size is 1930x745)
All other Image settings set to 0%
Stars and Moon 300%
All other Atmosphere settings set to 0%
Is there anything I can do to clean up this render and eliminate these "blotches"?