I set Debugshowshadowvolume is true in GroundPolylinePrimitive.js . When I drawing polyline, clampToGround is set to true. It is found that the polyline shadowVolume will be displayed. I studied PolylineShadowVolumeFS.js, want to know if the red extension surface is based on CZM_ Generated by globedepthtexture. Can I change the direction of this face for subsequent operations. Because when I draw polyline in the vertical plane, the effect is very unsatisfactory
