The component mesh primitives. Each particle draws a whole mesh, one particle at a time; meshes are never batched.
Which mesh. When the system is prepared, the client loads what Mesh names: the
skinned pair with its animation, and a static mesh chosen by the extension of
mSimpleMeshName. At draw time a .scb wins over a .tmesh or .gmesh, and either wins
over a skinned mesh. When the attached mesh's own Mesh loads nothing, it draws the
owner's skinned mesh; see
VfxShimmerPrimitiveAttachedMesh. Whether a
plain component mesh draws its own skinned .skn mesh is not yet identified.
Orientation. Without a FacingMode, the mesh takes the particle's orientation and is
not turned toward the camera. Component meshes have no AlignYawToCamera or
AlignPitchToCamera flags, so the camera alignment of
legacy meshes stays off.
Pointer<VfxShimmerFacingMode> Turns each particle toward the camera. The facing mode chosen decides how; see VfxShimmerFacingMode. When it is unset, the mesh keeps the particle's orientation. Instanced mesh draws pass the facing mode to the shader.
Embed<VfxMeshDefinitionData> The mesh to draw, in the same form legacy mesh primitives use; see VfxMeshDefinitionData.