I have characters with vertex animations that have just turned into black shadows. This is a picture from editor. Im assuming in game will be the same.
Creative
Other
Add a VAT
It should look normal and animate
It’s a blacked out shadow
PC, probably more
9909-6421-7669
FORT-1113646 has been created and its status is ‘Unconfirmed’. This is now in a queue to be reproduced and confirmed.
Confirmed this is also broken on live code
Thank you, we’ll let the team know.
I’m experiencing a similar issue after the v41.00 update.
In my case I’m using World Position Offset (WPO).
My material uses these nodes for the animation:
Time node
Multiply (Time × a ScalarParameter for rotation speed)
RotateAboutWorldAxis_cheap (driven by WorldPosition) feeding into the World Position Offset output
In the editor, I can still see the wireframe moving/animating (so the WPO seems to still compute), but the actual rendered mesh is fully black, only the outline shape moves while the mesh itself is blacked out. In-game, the animation doesn’t work at all, it just stays as a static black shadow.
So it really looks like the WPO is still being calculated, but the material rendering itself is broken since v41.00. Might be the same root cause as your VAT issue, affecting material-driven animations in general.
I’m trying to find a workaround on my side and will share if I find anything. Following this thread!
I just checked my material that uses WPO (in the editor), and it seems to be working fine… 
(post deleted by author)
I will try the Thunderbolt of Zeus the next time I have the editor up and let you know. 
