MCRcortex / MCRcortex/voxy

[Intel] Visual crack between LOD and near-field rendering (since v0.2.14)

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Description

When enabling Voxy, there is always a visible crack/seam between the LOD (distant terrain) rendering and the near-field rendering area.

Shader: Photon

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Shader: None

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F3:

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I tried downgrading to previous versions and discovered that this issue only occurs in Voxy versions since 0.2.14.
On 0.2.16-beta (current): The crack is visible.
On 0.2.13: The LOD simply disappears into the fog without Photon, but it works perfectly fine with Photon enabled.
This suggests the rendering regression was likely introduced after version 0.2.14.

Environment
GPU: Intel Arc B390
OpenGL: 3.3.0
Minecraft: 1.21.11
Fabric: 0.19.3
Voxy: 0.2.16-beta
Sodium: 0.8.12
Iris: 0.10.7
Expected behavior
The LOD mesh should seamlessly connect with the near-field terrain mesh without any visible gaps, regardless of whether Photon is enabled.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the seam at the boundary between LOD and near-field rendering on the listed Intel Arc and Minecraft setup, testing Photon enabled and disabled. Compare behavior between Voxy 0.2.13 and 0.2.16-beta to narrow the regression introduced after 0.2.14. Done means the LOD mesh connects seamlessly to the near-field terrain without a visible crack in both shader configurations.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
52/100

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