Update README.md

README.md

@@ -263,7 +263,7 @@ Options passed to `fetch` when loading tile set and model data.
 errorTarget = 6 : Number
 ```
 
-The target screenspace error in pixels to target when updating the geometry. Tiles will not render if they have below this level of screenspace error.
+The target screenspace error in pixels to target when updating the geometry. Tiles will not render if they have below this level of screenspace error. See the ["geometric error" section in the 3d tiles specification](https://github.com/CesiumGS/3d-tiles/tree/master/specification#geometric-error) for more information.
 
 ### .errorThreshold
 
@@ -271,9 +271,9 @@ The target screenspace error in pixels to target when updating the geometry. Til
 errorThreshold = Infinity : Number
 ```
 
-Value used to compute the threshold `errorTarget * errorThreshold` above which tiles will not render. This is used to enable traversal to skip loading and rendering parent tiles far from the cameras current screenspace error requirement.
+Value used to compute the threshold `errorTarget * errorThreshold` above which tiles will not load or render. This is used to enable traversal to skip loading and rendering parent tiles far from the cameras current screenspace error requirement. If `errorThreshold` is set to `Infinity` then all parent tiles will be loaded and rendered. If it's set to `0` then no parent tiles will render and only the tiles that are being rendered will be loaded.
 
-If `errorThreshold` is set to `Infinity` then all parent tiles will be loaded and rendered. If it's set to `0` then no parent tiles will render and only the tiles that are being rendered will be loaded.
+Note that if the camera position zooms in or out dramatically setting this to a value other than `Infinity` could result in tiles flickering if the renderer updates to display tiles that were previously outside the error threshold. As such this setting is best suited for when camera movement is limited smaller movement scales such as real world movement speeds.
 
 ### .maxDepth