It looks like Widowmaker can now see enemy barriers through walls if they get tagged by her Venom Mine.
As most players with experience on the hero will know, Widowmaker’s Venom Mine doesn’t just deal damage.
When triggered, the Venom Mine releases a cloud of poison gas that tags enemies in range, not only hurting them but making them temporarily visible through walls. The effect is the same as Widowmaker’s ultimate, albeit much more limited in extent and duration.
Now, however, it seems that the effect can also be applied to barriers, both dealing damage and allowing them to be seen through walls.
Static barriers such as Winston’s Barrier Projector or Orisa’s Protective Barrier can’t trigger the mine themselves, but if it is triggered within range by another hero then the shield will also be tagged, as u/RandomDentyne demonstrated.
The only exception to the change seems to be Symmetra’s Photon Barrier, which doesn’t get tagged in the same way – although in that case it’s fairly hard to miss even if you can’t see it through walls.
While it’s a relatively small detail in the grand scheme of things, information is always useful – especially for a hero that only needs one shot to make a massive impact on the game.
Knowing where a barrier is – or perhaps just as importantly, where it isn’t – could be crucial in finding the angle you need to get a pick. This is especially true in narrower choke points where a single barrier can cut of multiple angles of attack, and when the barriers in question are abilities with a cooldown, such as Winton’s or Orisa’s.