How to Enable Wind on Hair Groom?

Development Character & Animation
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1

I’m sure there must be a simple answer to this, but honestly, simply cannot find a working solution scouring online. I have hair grooms imported from Blender. Niagara simulation is enabled. Now, how do I actually get wind to effect the groom curves? Please see short youTube video describing my issue. Ideally, I just would like this to be real-time for some turntable renders. Thx! https://youtu.be/eJcyh6XjUrY

2

Hello there @stevetalkowski!

Considering you have grooms curves and Niagara already in place, it’s most likely a matter of linking them together. To run a quick check:

  1. Make sure Hair Simulation is enabled, in your Groom Actor > Details, enable Simulation, then assign a Niagara Hair Physics Asset

  2. Your scene should have Niagara wind actor, WindDirectionalSource, with your choice of values for strength, speed, and gust

  3. Finally, check your groom aset, confirm it’s using a Niagara system, then open it, and ensure it has a Wind Force module assigned

3

@brs-sebascova Thx for the quick reply! Ok, a few questions and clarifications…

I created an Actor Blueprint which is comprised of the Static Mesh Component of my character’s full geometry, and ten Groom Components parented to the Static Mesh.

I am unclear on how to generate a Niagara Hair Physics Asset. Does this require that each of the ten Groom Component’s need to have a Binding created first? Once I figure this out, i will have Step 1 fully completed.

Step 2. I do have the WindDirectionalSource added to the scene.

Step 3. Would this be in the Physics tab? I see “Niagara Solver > Groom Springs” and Custom System (grayed out) with StableSpringsSystem active. I am unable to open this to check for Wind Force module.

I hope this all makes sense - i feel like i’m just missing a few crucial steps. Creating the Niagara Hair Physics Asset, assigning it properly, then verifying the Wind Force module is assigned.