CurseForge · Minecraft mod

Voxy Iris Reverse-Z Fix

Fixes an incompatibility between Voxy and Iris 1.11.4+

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Quick answer

Which Voxy Iris Reverse-Z Fix release should I use?

Updated 4 days ago

Latest stable file voxy-iris-revz-fix-1.0.0.jar

Game version 26.2

Loader Fabric

Voxy Iris Reverse-Z Fix voxy-iris-revz-fix-1.0.0.jar targets 26.2 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.

Where it goes

Is Voxy Iris Reverse-Z Fix required on the client, server, or both?

The project page does not say whether this file belongs on the client, dedicated server, or both.

Client Source doesn’t say

Dedicated server Source doesn’t say

Loader for this release Fabric

Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source does not explicitly classify this release as client-only or server-only.

Understand client and server requirements Read the Minecraft installation guide

What else does Voxy Iris Reverse-Z Fix voxy-iris-revz-fix-1.0.0.jar need?

voxy-iris-revz-fix-1.0.0.jar. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Voxy Iris Reverse-Z Fix without breaking your instance.

Built for Voxy Iris Reverse-Z Fix voxy-iris-revz-fix-1.0.0.jar. Pick another file and the loader, install side or required mods may change.

01
Stick to this file

Use voxy-iris-revz-fix-1.0.0.jar. It targets 26.2 with Fabric; another release may have different loader, side or dependency requirements.
02
Bring the mods it needs

This file does not list any required mods. Do not add a library just because a different file uses it.
03
Put it on the correct side

The project page does not say whether this file belongs on the client, dedicated server, or both.
04
Pick the file you checked

Use the “Get this file” button beside voxy-iris-revz-fix-1.0.0.jar. It opens that exact file at the source.

About this project

What does Voxy Iris Reverse-Z Fix add?

A small client-side compatibility patch for Voxy when used with Iris 1.11.4+ and a shaderpack (e.g. Photon).

Fixes sky textures clipping through distant LOD terrain and broken lighting when using Iris shaders with Voxy

What it fixes

Iris 1.11.4 replaced its old "switch the world to forward-z while shaders are active" with a depth transformer: the world now stays in the native reverse-z layout and pack shaders get translated (depth reads/writes inverted, gbufferProjection undo-rev-z'd, ...).

Voxy versions built before that change still force forward-z whenever a shader pack is active, so:

Voxy's own depth buffers/projection disagree with the framebuffer Iris renders into.
vxDepthTexOpaque and vxDepthTexTrans contain forward-z values while Iris inverts them before the pack sees them, so pack code such as Photon's is_lod_terrain() classifies sky pixels as LOD terrain. The result is broken/duplicated sky textures and broken LOD shading.
Voxy's injected shader patches (voxy_opaque.glsl and voxy_translucent.glsl) read depthtex1 / vxDepthTex* / gl_FragCoord with nobody transforming them.

This mod makes Voxy advertise the native reverse-z state, hands the pack undo-rev-z'd vxProj/vxViewProj matrices and runs the injected patch glsl through Iris' own TransformPatcher.patchDepth().

Requirements

Minecraft 26.2, Fabric loader
Voxy 0.2.17-alpha or newer (all 26.2 builds; verified against 0.2.19-beta and the dev branch)
Iris 1.11.4 or newer
Any shader pack that uses Voxy's shader integration for the full fix

Project description from CurseForge.

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