That was my mistake.
I adapted this on request from an AU livery I did, and I forgot about the discrepancy between how we handle real vs. AU drawings. I do tend to play things a bit looser in AUs, with things like gradients, "metallic" schemes, etc., but I understand why we avoid that in real-life drawings where others may be trying to adapt the same livery in their own drawings. I'll fix the Virgin America livery when I have some more time.