Ilya Shevelev

When I try to pass GEOCCS as wkt I got an error: Input: ``` var geoccs_wkt = 'GEOCCS["NAD27 Michigan",DATUM["NAD27 Michigan",SPHEROID["Clarke 1866 Michigan",6378450.0475489,294.978697164677,AUTHORITY["EPSG","7009"]],AUTHORITY["EPSG","6268"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]]]' var geogcs_wkt = 'GEOGCS["NAD27 Michigan",DATUM["NAD27 Michigan",SPHEROID["Clarke 1866 Michigan",6378450.0475489,294.978697164677,AUTHORITY["EPSG","7009"]],AUTHORITY["EPSG","6268"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9102"]],AUTHORITY["EPSG","4268"]]'...

Performance drop with points cloud and apearance issues starting from version 1.97.

6

**Description**: Point Cloud tilesets that were rendered without any problems in Cesium 1.96 and prior versions are rendered inappropriately and with a significant performance drops in Cesium starting from version...