Panu Lahtinen

> activating the automatic regridding by default avoids the risk of users resampling the 1-d points to a 2-d grid with methods that can introduce artifacts (e.g. nearest or bilinear...

Thanks @ameraner for the insight! I just today got my MTG/LI processing chain completely functional (needed the new Satpy version for S3 support), and I'm using `resampler='bucket_count'` to aggregate the...

The definition of `ash` is here: https://github.com/pytroll/satpy/blob/main/satpy/etc/composites/visir.yaml#L125 I'll post you my "resolution-aware" configs after lunch. There I have set the channel differences to use channels that have equal resolution.

> Even with the same resolutions, there are sometimes some weird artifacts (here above Bretagne for example) where it seems that the clouds don't exactly overlap in the different channels....

> However I would expect to see some differences as the last band is taken at the original 1 km resolution. Probably that's not enough to see a difference in...

Since I posted that, I actully removed the `resolution: 1000` from the green channel. So if HRFI is completely missing, I'd still get an image.

First test with ```yaml night_microphysical: compositor: !!python/name:satpy.composites.GenericCompositor prerequisites: - compositor: !!python/name:satpy.composites.DifferenceCompositor prerequisites: - name: ir_123 resolution: 2000 - name: ir_105 resolution: 2000 - compositor: !!python/name:satpy.composites.DifferenceCompositor prerequisites: - compositor: !!python/name:satpy.composites.Filler prerequisites:...

And don't mind that the composite doesn't look like what Night Microphysical should, I seemed to use a day-time scene :see_no_evil:

No performance hit that I can see. Compared to the normal version that leaves the gap, the processing time is within 0.1 seconds for this one composite and similarly negligible...

> Using only FDHSI to avoid #2460, applying `nir_emissive` when loading `geo_color_low_clouds` does not look great. I think the strict limit comes from the way the emissive part is computed...