Thanks for letting me know that FSDT removes this feature. I found the same problem at KLAX.
We haven't "removed it", it's a side effect of how the scenery ground layer is made, with native FSX commands and shaders. We simply decided having a better looking ground and a better frame rate ( JFK gained 30% fps from V1 to V2 because of this ) is better than having the Progressive Taxi.
However they did not remove them at any of the other FSDT airports I have so I assumed I had done something wrong that caused them not to be visible.
Only our recent airports use that method (KDFW, KLAX, CYVR and KJFK V2), that's why you still have the Progressive taxi line at the others.
I'm surprised that they did not tell me that they were removed when they responded to my post. Thanks for filling in for their omission.
You never asked for the missing progressive line, you only asked why the yellow taxilines were not visible from the VC, I don't see why such question should trigger a complete reply of *everything* else that we "removed" from the scenery, for example we also removed default ground vehicles...when you subsequently added the question about the progressive lines, you ARE being replied now. I'm sorry for not having replied *immediately* to your 2nd question which mentioned the progressive lines, but it was 12:43 AM in the night here when you posted it...
However, at least for arrival (and we'll eventually add the Follow to the runway feature), the progressive line is basically replaced by the GSX Follow Me car, which at least IS a real-world procedure. It also has the advantage of being available at ANY time, and can direct you at ANY parking of the airport, while the progressive line works only if you enabled the FSX ATC and only to the parking assigned by the ATC.