The tiles covered the WMS Line ?

I created Cesium World Terrain and , then add CesiumWebMapServiceRasterOverlay and CesiumTileMapServiceRasterOverlay ,It looks normal。 but after I add Cesium3DTileset,
The tiles covered the WMS Server blue line,how to config let WMS Server blue line dont be cover,

Hello @IndigoYun,

Since the 3D tileset is above the terrain, it will inherently cover that WMS blue line. If you need, you could look in to custom materials or masking. However, it might be easier to simply add the WMS overlay to the 3D tileset as well, if you need it to appear on both.