Watching Night Fog — Halloween Horror Fog for VRChat

▶ VRChat avatar effect · PC only · needs Modular Avatar (free, from VCC) · drag-and-drop prefab

Not made for one avatar: Modular Avatar hooks it to your avatar's own bones at upload, so it works on humanoid avatars in general. Checked in Unity on the VRChat SDK sample avatar.

🎃 A red fog for Halloween nights. It lies around your feet, full of eyes, and a dead forest grows out of the ground around you. Turn on "Hide in fog" and the fog rises over you until you're gone, while a blood moon with an eye comes up behind you.

THE MENU ("Night Fog")

• Fog: the whole effect on/off (on when you first wear it, remembered)
• Hide in fog: raises and lowers the fog (always starts lowered)
• Trees: the dead forest on/off (on to start, remembered)
• Tree count: a radial from 0% (no trees) to 100% (a dense forest), starts at 50%, remembered
• Eyes: the eyes in the fog and on the trees on/off. The moon stays. (On to start, remembered)
• Eye count: a radial for how many eyes. 50% is normal, 100% is twice as many, 0% is none. Starts at 50%, remembered

HIDING IN THE FOG

Switch Hide in fog on and the fog rises from your feet to above your head in 3 seconds. You're completely hidden, only the eyes look out. Switch it off and it sinks back down. The blood moon rises and sets with it. The forest has its own toggle, so you can hide with or without the trees.

FOG AND EYES

The fog lies around your feet and drifts slowly with the wind, rolling up at the top. When you walk it stays on the ground: it gathers where you step, trails behind you and breaks up into wisps. Red light streams up behind your back.

There are 10 eyes in the fog (20 at Eye count 100%). They open, look around and fade back. Walk and they fall behind you too: one opens near you, stays put as you pass, closes behind you, and a new one opens. 39 more eyes hang from the branches and sit in the trunks (71 at 100%). Look straight at one and it looks back. Behind you, a blood moon with a slit eye rises under drifting cloud.

THE DEAD FOREST

The trees grow up from their roots with glowing tips and sink back into the ground when you turn them off. They stay on the ground too, so as you walk the trees ahead rise and the ones behind you sink. Trees don't grow right around you, so they don't get in your way.

3 COLORS

• Blood: red fog, gold eyes
• Ash: pale fog, gold eyes
• Void: violet fog, red eyes

One prefab per color.

EASY TO PUT ON

It's a Modular Avatar prefab. Drag it onto your avatar and upload; the "Night Fog" menu, parameters and animator layers are added for you.

WHAT'S INCLUDED

• NF_1.0.0.unitypackage: 3 prefabs (Blood / Ash / Void), 4 shaders, materials, menu and animator
• README (English and Japanese)

SPECS

• Tris: 13,344 (every tree and eye is counted, whatever the settings)
• Mesh renderers: 4 / Materials: 4
• Particles: none / Lights: none
• Synced parameters: a few Bools and two Floats (small)

REQUIREMENTS

• Modular Avatar (available through VCC)

TESTED WITH

Unity 2022.3.22f1 / VRChat SDK 3.10.5 / Modular Avatar 1.18.7

PC only (custom shaders, no Quest version).

GOOD TO KNOW

• There are a lot of eyes. It's meant to look a little creepy.
• The moon is drawn about 7 m behind you, so in a small room the walls can hide it.
• People who block custom shaders in their Safety settings won't see the effect.
• The trail uses VRChat's own movement speed (VelocityX / VelocityZ), so it adds no synced parameters.

SUPPORT

Something not working as described? Message me and I'll fix it and send you the update for free. Same if you have trouble putting it on.

TERMS

• OK to use on your avatar in VRChat and other platforms
• OK to stream, record, and post on social media
• Editing is fine
• Please don't redistribute or resell the files, edited or not

UPDATES

• v1.0.0 (2026-10-26) first release

⭐ If you like it, a quick rating helps a small new shop a lot. Thank you!