dynamicScreenSpaceErrorDensity
Similar to Fog.density, this option controls the camera distance at which the Cesium3DTileset.dynamicScreenSpaceError optimization applies. Larger values will cause tiles closer to the camera to be affected. This value must be non-negative.
This optimization works by rolling off the tile screen space error (SSE) with camera distance like a bell curve. This has the effect of selecting lower resolution tiles far from the camera. Near the camera, no adjustment is made. For tiles further away, the SSE is reduced by up to Cesium3DTileset.dynamicScreenSpaceErrorFactor (measured in pixels of error).
Increasing the density makes the bell curve narrower so tiles closer to the camera are affected. This is analagous to moving fog closer to the camera.
When the density is 0, the optimization will have no effect on the tileset.