4.25 Cascade - SizeByLife stopped working for VAT mesh

Development Asset Creation FX
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1

In 4.25 I encountered a strange error with animated meshes (Vertex Animated Texture) from Houdini inside cascade particle system. Particle mesh is no longer responding to rotating and scaling inside cascade.

Steps to reproduce:

  1. download the example project ( Game Tools | Vertex Animation Textures | SideFX - Download support files button)
  2. launch in 4.24
  3. Go to Content\SideFX_VertexAnimation\FLUIDS
  4. Create New Particle System and open it
  5. In Particle Emitter add: TypeData - New Mesh Data, Material - Mesh Material, Size - Size by Life, Rotation - Init Mesh Rotation
  6. In Mesh Data change ParticleCube to ExplosionPig_mesh
  7. In Initial Size change to distribution to Distribution Vector Constant 1, 1, 1 (default values are too big)
  8. In Size By Life module change 0 point Out Val to 0.5, 0.5, 0.5
  9. Init Mesh Rotation keep the default values
  10. Drag NewParticleSystem to Level, everything looks as intended, particle mesh is scaling properly and rotating around 360 degrees.
  11. Save changes and close project.
  12. Switch version from 4.24 to 4.25.
  13. Launch project in 4.25 version.
  14. Observe that NewParticleSystem no longer behave as in 4.24, scale and rotation modules doesn’t apply.

Additional video link

2

This is happening with all Static Meshs at 4.25. An alternative is to decrease the mesh to the minimum value you want and then work on the cascade with values ​​above 1