A licensee has reported that their vertex animations are leaving a lot of be desired with anti-aliasing. Specifically using vertex animated meshes can leave aliasing remnants behind while it's shifting that can be noticeable up close and more so from distances.

I've attached a video to demonstrate, but the quality may not be the easiest to see. The attached project is this setup and will probably demonstrate much more easily.

Steps to Reproduce

If using attached Project:
1. Unzip and Open attached Project
2. Snap view to camera location
3. should see aliasing remnant delay after animation shift

Setting up from scratch:
1. Open UE4
2. Import and setup vertex animated meshes and textures (Attached in zip file) Use this docs to setup each:
3. Place the meshes in the scene
4. Get close enough so that it blocks part of the scene behind it
5. will visibly see aliasing remnants

Results: There will be aliasing remnants behind the portion of the mesh that is animating. At distances this can be more noticeable.

Expected: Aliasing shouldn't be as noticeable.

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ComponentUE - Rendering
Affects Versions4.84.9
CreatedJun 2, 2015
ResolvedAug 2, 2016
UpdatedJul 14, 2021