How do I add Motion Blur to a VAT liquid sim in Unreal?

General Discussion
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#1

I’m trying to add motion blur to a VAT blood splatter in Unreal 5 with really weird results.
I can have motion with a MF_TransformVelocity but there’s a lot of horizontal lines and it’s very inconsistant.

2022-08-03 17_11_58-Window

2022-08-03 14_25_44-Window
2022-08-03 14_25_44-Window642×738 487 KB

2022-08-03 14_25_57-Window
2022-08-03 14_26_58-Window
2022-08-03 14_26_58-Window1339×690 144 KB

2022-08-03 14_28_15-Window
2022-08-03 14_28_15-Window1339×728 140 KB

I’ve tried the method explained in this thread but with no success:

I have a velocity texture exported that I’m not sure where to plug.

#2

Sample the velocity texture at the same uv’s as the position texture, transorm from local to world, then previous frame is current frame - the result of that transform.

#3

In VAT 3.0 Demo have working motion blur