Fog seemed to pop up further away in my testing. I was also slewing my plane so was travelling significantly faster than normal.
It seems that no visibility information is pulled from meteoblue. This is very apparent in NZ where we only have 3-4 METAR stations that register in MSFS. NZAA was blanketed as per the METAR correctly however looking at meteoblue maps the fog layer should extend significantly further out along the coast and off shore.
Fog depiction in sim approximately circled.
This is likely why we notice these big areas of haze in some areas where METAR coverage is sparse because only areas in the vicinity of METAR reporting stations can display visibility data. If the meteoblue data was actually used by the sim we would have seen a more gradual buildup along the coast so that the METAR haze layer wouldn’t have stuck out like a sore thumb (or materialize when you’re right over it).