First of all, I sincerely apologize for using an AI assistant to write this bug report. My English is quite limited, so I used AI as a compromise to ensure the technical details are communicated clearly to you. Please rest assured that all the data here is real—I have personally conducted extensive testing in-game to pinpoint the exact coordinates where this shadow glitch occurs.
Environment & Versions
Minecraft Version: 26.2(Note: Further testing indicates this bug is likely persistent across multiple/older Minecraft versions as well).
Modding Environment: Iris Shaders (Bug is isolated to Iris; cannot be reproduced on OptiFine)
Shader Pack Versions: v1.20 & v1.21
GPU: NVIDIA GeForce RTX 5070 Ti
Graphics Driver: NVIDIA Studio Driver 610.62
Description
When traveling to extreme coordinates in the world, distinct shadow artifacts and rendering errors begin to appear across all terrains and surfaces. This visual glitch triggers specifically when the absolute value of the X or Z coordinates exceeds approximately 8,388,600
Steps to Reproduce
1.Launch Minecraft with the Iris environment installed.
2.Enable the shader pack (v1.20 or v1.21).
Teleport near the threshold coordinates, for example: /tp 8388580 70 0
3.Walk out past the ~8,388,600 mark and observe the shadows on the ground.
4.Cross-check: Repeat the steps using OptiFine instead of Iris to verify the correct rendering behavior.
We highly appreciate your work on this shader pack. While we understand it was originally designed and optimized for OptiFine, a vast majority of the modern Minecraft community now relies on the Iris Shaders environment for performance and modern modpack compatibility. Since this incredible shader pack runs beautifully in most scenarios under Iris, fixing this specific edge-case coordinate bug would mean the world to the community and make the shader fully playable for everyone. We kindly request your assistance in looking into this Iris-specific compatibility issue. 🙏
First of all, I sincerely apologize for using an AI assistant to write this bug report. My English is quite limited, so I used AI as a compromise to ensure the technical details are communicated clearly to you. Please rest assured that all the data here is real—I have personally conducted extensive testing in-game to pinpoint the exact coordinates where this shadow glitch occurs.
Environment & Versions
Minecraft Version: 26.2(Note: Further testing indicates this bug is likely persistent across multiple/older Minecraft versions as well).
Modding Environment: Iris Shaders (Bug is isolated to Iris; cannot be reproduced on OptiFine)
Shader Pack Versions: v1.20 & v1.21
GPU: NVIDIA GeForce RTX 5070 Ti
Graphics Driver: NVIDIA Studio Driver 610.62
Description
When traveling to extreme coordinates in the world, distinct shadow artifacts and rendering errors begin to appear across all terrains and surfaces. This visual glitch triggers specifically when the absolute value of the X or Z coordinates exceeds approximately 8,388,600
Steps to Reproduce
1.Launch Minecraft with the Iris environment installed.
2.Enable the shader pack (v1.20 or v1.21).
Teleport near the threshold coordinates, for example: /tp 8388580 70 0
3.Walk out past the ~8,388,600 mark and observe the shadows on the ground.
4.Cross-check: Repeat the steps using OptiFine instead of Iris to verify the correct rendering behavior.
We highly appreciate your work on this shader pack. While we understand it was originally designed and optimized for OptiFine, a vast majority of the modern Minecraft community now relies on the Iris Shaders environment for performance and modern modpack compatibility. Since this incredible shader pack runs beautifully in most scenarios under Iris, fixing this specific edge-case coordinate bug would mean the world to the community and make the shader fully playable for everyone. We kindly request your assistance in looking into this Iris-specific compatibility issue. 🙏