Overview

This is a custom shader/Poiyomi module that gives your eyes, nails, or other parts a red-eye effect or tapetum lucidum: it's the retroreflective effect you see in animals when they look at you with a bright light in your line of sight.

Your eyes will appear normal, but whenever there's a realtime light in a scene (or if you configure it to always be on) your irises will appear to luminesce with a brilliant color of your choosing! The effect is non-uniform, directed at the viewer, changes as your eyes move relative to each viewer, and reflects with a pleasing and complex gradient that's unlike any normal texture. It also works great on fingernails/claws, horns, or any iridescent material on clothing.

Note that due to the way the mirror clone works, you usually won't see light-based effect in normal mirrors. To see your materials glinting during direct light, you'll need to use the camera, stream camera, or face mirror in the radial Tools menu. Others will see your eyes glint normally when you look directly at them.

Social Media

Join my Foxipso's Den Discord and/or Follow me on X/Twitter for product updates, support, discounts, and announcements!

Installation

Installation is straight-forward and involves dragging in a unitypackage, dragging the material onto your eye, and using a mask to mask out the areas you want to reflect light.

Masks are already included for the Rexouium, Nardoragon, Kobodal, ChibiKobodal, and Foxipso Base. (The Foxipso base comes with this shader already included and configured.) Two included installation videos show you how to quickly make a mask for any other avatar as well as use it on your nails or other parts of your avatar.

As always, contact information for support is in the README.txt. Please reach out with any problems!

Note

There's currently a limitation for avatars that have a transparent material over the eye (like a cornea) with the rendering mode set to TransClipping and the Glint module set to only activate with Point/Spot lights. If you want to have both effects you need to change from TransClipping to Fade, but check first! Removing clipping can cause transparency issues if the eyes clip through one another. I've found the Tosca Lupis v5 is like this, and thus on avatars like that you'll be limited to using Cutout mode (no cornea layer), modifying the eye mesh to not clip, or having the glint effect always on.

Version History

Version 1.3.1 - February 18th, 2026

• Fixed a packaging issue where 1.2 was included for the Toon shader instead of 1.3

Version 1.3 - February 17th, 2026

• Added support for VRC Light Volumes (require light section)
• Added support for Directional Lights (require light section)
• Added mode to trigger in darkness (works as an "OR" with light section)
• Combined redundant Intensity and Emission sliders
• Added community-made masks for additional avatars, provided by Horsesgamer
• Upgraded to Poiyomi 9.3.66

Version 1.2.1 - February 2nd,, 2026

• Huge update! The shader is now a Poiyomi Module! Adds complete integration with Poiyomi and ships with the module plus a pre-compiled version of "Poiyomi Toon + Foxipso's Glint", along with several variants.
• Hue shifting
• Blinking (Time-based fading in and out)
• Can appear with or without direct light (new setting)
• Audio Link integration
• Works with Poiyomi masks--combine effects
• Many more configurable options

Version 1.1 - February 9, 2024

Bugfix where the base map was showing up in black and white, and only adding color when emission was applied

Version 1.0 - February 9th, 2024

Initial release

Thanks To

Sacred, Horsesgamer

Included Masks

ChibiKobodal, Foxipso Base 1.0 - 1.3, Foxipso Base 1.4, Kobodal, Lupis v5, Nardoragon, Novabeast, Rexouium V005

Community-Provided Masks

(The following provided by Horsesgamer)

Abiboi-Deuzear, akittu-Stylized Experiment, Aluesia - Completely Canine, Aluesia - Completely Feline, Azuki - Mayu V3, BurnToShine-Stellaura, BurnToShine-Zephyra B, Cherryvania CherryBuns, CleanerWolf-CleanerWolf, Cyangryphon - KhnFuCat, Darbi-D.Otter V2, Darbi-Kiggy (Male+Female), Darbi-Sweet Hooves V2, Darbi-The Fox Moth V1, Ember-Drekkkubus, Fera Facade-Werewolf, FoxiPaws-Archer Canine (Eyes Kri), FoxiPaws-Archer Canine (Eyes Snake), FoxiPaws-Archer Canine (Realistic Eyes), Ghost Cabbit-Drox (1.0.0), Ghost Cabbit-Freakhound (1.3.1), Hantor-Thingy Circle(V1.1), Hantor-Thingy Goat(V1.1), Hantor-Thingy Heart(V1.1), Hantor-Thingy Sparkle(V1.1), Hantor-Thingy Square(V1.1), Hantor-Thingy Star(V1.1), Irix-Taidum (V1), Irix-Taidum (V2+V3), Julia Winterpaw Masc Canine (Flatcolor Eyes), Julia Winterpaw Masc Canine (Realistic Eyes), Kudalyn-Jex (Update 2025), MiloFox - Kit~, Neffertity - Dovabrodian(Update Feb 2026), Nicoreda-Dergodal (V1.4), Nicoreda-Dergotoy, Nicoreda-Felidal (V1.1), Nicoreda-Kobodal2.0, Nicoreda-Sergodal V1.05+, Nicoreda-Snoggodal, Oken-Fennec, Oken-Meowvern, Oken-Tygra, Reval-Furpaw, Reval-Vulper, Shiapra-Bunnia, suko-doge-Chibitora, Tosca - DovaDog and DovaCat, Tosca-Howler, UnlikelyFloof-FloofKitty, Voxian-AvaTaur