ue-udw-particles-lightning-wind-sounds

Use Simple Collision mode and ensure the roof has simple collision geometry that blocks the Weather Particle Collision Channel (default Visibility) with queries enabled. If particles come through a high ceiling, raise Ceiling Check Height on UDW.

Add the UDW_Lightning Strikable Actor Interface to the actor and implement Test for Potential Lightning Strike and Struck by Lightning. Then enable Lightning Flashes Striking Actors on UDW and set the fraction of flashes that can strike actors above zero.

Simple Collision line-traces against level geometry on the CPU and offers precise blocking, including UDS Occlusion Volumes. Distance Field Collision is GPU-cheap but requires mesh distance fields and cannot be separated from distance-field lighting.

Instanced Stereo does not support GPU sprites with deferred decal materials, which is the default splash setup. Set Splash Particles Rendering Mode to Translucent so splashes render in both eyes.

UDW controls a Wind Directional Source component that chaos cloth and SpeedTree read. Verify the Wind Directional Source category is enabled on UDW and that Disable when in interior is not suppressing it while the player is occluded.

Sound Occlusion traces from the camera may be hitting surfaces they should not. Adjust Player Occlusion settings on UDS (trace count, channel, update period), or add a UDS Occlusion Portal to openings like doors and windows.