Modern PSX Shader Compat
Modern PSX Shader Compat is a small client-side fix that keeps layered models from jittering against PS1-style vertex snapping in the ModernPSX shader pack.
What it does
ModernPSX applies PS1-style vertex snapping, and layered models such as banners, other layered block entities and entity model layers can fight it, producing a visible jitter where the layers sit at the same depth. This compatibility mod groups the related layers so they share one snapping reference and stay together, without switching vertex snapping off.
The mod also covers Fresh Animations, Wakes and armour eyes with emissive textures or similar overlays. Fresh Animations is handled through EMF and ETF, and Wakes water effects are supported as well. Other supported mods are detected automatically and need no setup. Without ModernPSX and Iris installed alongside it, this mod has no effect, and both are required.
Files are published for Fabric only, for Minecraft 26.2, with 0.3.8 as the latest build from 2026-08-02. Only the client needs it, so servers run without it and players install it like any normal client mod alongside the shader pack. It is released under the MIT License and is not open source.
Key features
Shared snapping reference
Related layers share one vertex snapping reference, so they move together rather than jittering apart.
Layered block entities
Banners and other layered block entities are kept consistent with the snapped geometry around them.
Entity model layers
Entity model layers are grouped with the same reference, so overlapping parts do not flicker against each other.
Overlay and emissive textures
Armour eyes with emissive textures and similar overlays are handled so they sit correctly on snapped models.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Shader pack players
Players running ModernPSX with Iris can keep the PS1 look while removing jitter on banners and layered armour.
Fresh Animations users
Players who use Fresh Animations through EMF and ETF can keep their animated models stable under the shader.
Who it’s for: Players who run the ModernPSX shader pack on Fabric with Iris and want layered models, Fresh Animations or Wakes to render without depth jitter.
Questions
Does Modern PSX Shader Compat need to be installed on servers?
Does Modern PSX Shader Compat work without ModernPSX?
Which Minecraft version does the mod support?
In the catalog
Modern PSX Shader Compat is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 13,894 mods support Minecraft 26.2.
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What the author says
A small client-side compatibility mod for the Modern PSX Shaders pack. ModernPSX uses PS1-style vertex snapping, which can cause layered models and effects to separate, jitter or fight over the same depth. This mod gives related layers a shared snapping reference so they stay together without removing the vertex…
Official listing
- Modrinth page
- modrinth.com/mod/modern-psx-shader-compat
- Owner
- mrjonatellosr
- Published
- 2026-07-30
- Updated on Modrinth
- 2026-08-02
- Facts verified
- 2026-10-15