imagico left a comment (openstreetmap/openstreetmap-website#6618)

> It would be nice if we could support high DPI screens. After all, as of the 
> latest release of OpenStreetMap Carto it was something we supported. We 
> didn't do it perfectly but it certainly was supported. It sounds like the 
> current maintainers might be changing that. 

To clarify on this (and to possibly also recruit contributors :wink:): 
OpenStreetMap Carto has worked towards supporting higher resolution rendering 
for more than a decade - relevant early work is, in particular, 
https://github.com/openstreetmap-carto/openstreetmap-carto/issues/1165.  
Another key step was 
https://github.com/openstreetmap-carto/openstreetmap-carto/pull/3657.  This 
work was substantially stalled by an ugly Mapnik bug 
(https://github.com/openstreetmap-carto/openstreetmap-carto/issues/2750), which 
led to some polygon patterns (in particular wetlands) being the only remaining 
aspect of the style that does not scale properly on higher resolution 
renderings (discussed 
[here](https://github.com/openstreetmap-carto/openstreetmap-carto/issues/2038#issuecomment-586732159)).
  There are some other things (in particular very narrow line signatures) that 
could use some tuning specifically for higher resolution rendering, but that is 
a fairly perfectionist concern.

It would probably be useful btw. if OSMF operations would clarify if supplying 
higher resolution OSM-Carto tiles hinges on the lack of worktime (hence 
volunteers interested in working on this are welcome) or if it is a 
strategic/economic decision not to (OSMF does not want to put infrastructure 
into this, even if there were volunteers willing and able to set this up and 
maintain it).

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