> Is it possible to add an option to override whatever XP is telling you?
Well, what you've got me thinking is whether we should always treat the visibility setting as a lower bound for the cloud visibility. That is, retrieve both values from X-Plane and use whichever one is higher. I think that's a good idea for SMP 4.
> Also I assume you are doing some type of interpolation between METARs?
SkyMaxx Pro doesn't do anything with METAR data directly, but if you also purchased Real Weather Connector, then we do. Cloud systems do tend to have distinct boundaries, so I lean away from blending the reports together and try to preserve those frontal boundaries. If you prefer your weather to be more uniform, you might consider using FSGRW together with SMP/RWC - we'll honor the weather data it outputs, which is more blended.