Trees' Shadows not moving

[Pateef]

Hello everyone!

This is a topic that has plagued my Unreal learning for quite a while and I don’t know what to do. Happened in UE 4, and now in UE5 (with Lumen and Nanite) and I havse searched for the answer on forums but all topics are left unrespoded…hope someone can help me!

I have a house with Trees from the Free Unreal Packs, that move in the wind with a lot of wind settings, yet the shadows from the trees never seem to move. I have a good rig so it’s not VRAM…I tried most solutions I found…but none worked.

If anyone has any ideas, I’m all ears.

Thank you in advance!

[Rev0verDrive]

enable dynamic shadows for the trees, disable static shadows.

If using the foliage tool to paint check the shadow settings.

[Pateef]

Thank you Rev, I will try that and report back

[JohnG500]

Hi Pateef - Just an FYI - I was having the same problem. Seems to be a long standing bug in UE. Doing the following fixed the issue for me:

Project Settings => Rendering => RAY TRACED SHADOWS => uncheck this box.

Ray Traced Shadows Dont Work With World Position Offset on Instanced Static Mesh or Foliage

WorldPositionOffset works for Ray Traced Shadows/Reflections on a static mesh. (Have to check Evaluate World Position Offset in mesh rendering section). However, using that mesh in an Instanced Static Mesh or as Foliage breaks ray traced shadows and reflections. (They dont take into account the WPO ) This is critical for foliage that uses wind among other effects. Much thanks for any feedback / help with this