As Tracey says, martagon seed pods get very fat, and you should notice the difference (compared to asiatics) in just a couple weeks' time. Martagon pods also have six very noticeable wings. These are the largest pods I've ever had, but the size isn't too far off from normal.
Compared with a typical asiatic:
Liium callosum
As Lorn mentioned, pointing toward the sky is
usually an indication of good seed to come. In the pic below, it's easy to determine that all but one of these were
not successfully pollinated. But what about the one on the right? I had wondered about it, too. In this case, it yielded many fertile seeds that I have germinated.
Lilium papilliferum
On the other hand, here's some more questionable pods. Lorn had predicted they would not produce good seed, and he was right. None of them did, and all they contained was chaff.
asiatic hybrid