Comparing Cesium to other map viewers like OpenLayers, Cesium 2D maps stand out as having poorer quality basemap rendering. For example, go to this OpenLayers example using OpenStreetMap imagery:
Then open Cesium (e.g. from the default demo on https://cesiumjs.org), select 2D mode from the dimension picker, and select OpenStreetMap from the Imagery picker. Zoom to the same basemap imagery and notice the difference:
In Cesium, the labels and lines are blurry, and the labels are also distorted looking. I love the 3D capabilities in Cesium, but I’d also like a nice 2D map. How can I make the imagery in the 2D mode nice and crisp?