Skeletal-mesh emitter

1. Add the skeletal sampler

1. Bake the exact skeletal mesh used by your actor. TUNS uses its LOD 0 geometry and the chosen UV channel.
2. Prepare a GPU emitter with a spawn count, initialization, fixed bounds and a renderer, as shown in the emitter setup.
3. Add TUNS_SampleSkeletalMesh after Initialize Particle in Particle Spawn.
4. Bind SamplingData to a BakedSurface user parameter containing the skeletal bake.

123

1. 1
   Particle Spawn

   Samples the current animated pose when each particle is born.

2. 2
   SamplingData

   Select the skeletal bake input.

3. 3
   Mesh

   Use TUNS Skeletal Mesh (GPU).

2. Set the mesh source

1. Expand Mesh. Set Source Mode = Attach Parent.
2. Set Preview Mesh to the matching skeletal mesh, and keep Whole Mesh LOD = 0.
3. Start with Seed = 0 and a small NormalOffset, such as 0.25.

123

1. 1
   Attach Parent

   Use the parent Skeletal Mesh Component.

2. 2
   Preview Mesh

   Choose the same mesh used by the bake.

3. 3
   Whole Mesh LOD

   Keep 0 to match the bank’s triangle indices.

3. Attach Niagara to the actor

1. Open the actor Blueprint. Add or select its Skeletal Mesh Component and assign the matching mesh.
2. Add a Niagara Component and drag it beneath the Skeletal Mesh Component in the Components tree. Assign your Niagara System.
3. For a local-space effect, reset the Niagara component’s relative location and rotation to zero and scale to 1. Compile, save and test Play with an animation.

12

1. 1
   AnimatedMesh

   The Skeletal Mesh Component playing the animation.

2. 2
   SurfaceParticles

   Attach the Niagara component here.

For surface attachment, continue with Follow an animated mesh. A shared skeleton alone is not enough: the mesh geometry and triangle topology must match the bake.