As i was using Cesium under unofficial TSW editor then my task was easy -> port that Cesium into the TSW 6 editor. Took me some time, tons of crashing, changing the code, but im finally close. It still crash sometime with no reason but its already working version. Once i will finish the stable version i will share that nice plugin, its very usefull for route builders. Here is just screen from TSW 6 editor and working Cesium plugin.
Ok so finally its done, ported Cesium plugin for TSW 6 editor v1.0 You can download it here: https://www.trainsim.cz/?mod=article&showid=2858