@zebrinest
Your question is not clear. The density of the Pressure field from a given weather model depends on the model resolution same as other parameters. Then the gridded field is smoothed. This cannot be changed.
On Windy isobars are plotted every 2 hPa, but would you like to have them less smoothed?
Or do you consider that the color scale of the Pressure layer is unprecise and vague. You can modify this color scale for yourself to have for instance different color steps for 10 hPa changes.
https://community.windy.com/topic/10336/customize-the-color-scales-of-windy-layers
Personally I prefer a color gradient like that:
5306B17E-52E0-4FBF-930D-A7A5BD268456.jpeg
