【BUG】Voxy 26.2: circular area fails to render after first import, fixed by re-importing

Environment

• Windows 11 Home 25H2
• Minecraft: 26.2
• Voxy: [0.2.18]
• Sodium: [0.9.1]
• Fabric: [0.19.3]
• Chunky: [1.5.3]
• Shaders: IterationRP / Sundial / Helian-MMCO / Eclipse
• Singleplayer

Description

After pre-generating a large area with Chunky and importing the world with Voxy, a circular area around the world spawn fails to render correctly.

The important part is that the area inside and outside the circle renders normally, while a ring-shaped area in between does not.

If I physically move around the affected area, the missing terrain gradually gets loaded and the problem disappears.

Initially I suspected a shader compatibility issue, because several different shaderpacks showed the same problem. However, running "/voxy import" again, the problem disappeared.

After the problem was fixed, I could enable all of the previously affected shaderpacks without the issue returning.

I also reproduced the same problem in a second Minecraft 26.2 singleplayer world, which makes me suspect Voxy rather than a corrupted world.

The same general Chunky + Voxy workflow does not produce this issue for me on Minecraft 1.21.11.

Steps to reproduce

1. Create/load a singleplayer world on Minecraft 26.2.
2. Use Chunky to pre-generate a large circular area (in my case, radius 512 chunks).
3. Import the world with Voxy.
4. Observe that a circular/ring-shaped area around the world spawn does not render correctly.
5. Moving around the affected area causes the missing terrain to gradually appear.
6. Running "/voxy import" again fixes the issue.

Expected behavior

The entire pre-generated area should be available in Voxy's LODs after the initial import.

Actual behavior

A ring-shaped area is missing after the initial import, but becomes available after moving through the area or re-importing the world.

Additional information

This happened in two different 26.2 singleplayer worlds. It also occurs with multiple shaderpacks, but after re-importing with Voxy, all of those shaderpacks work normally.

This makes me suspect that the initial Voxy import/LOD ingestion is sometimes incomplete or fails to update some LOD regions correctly.

Start by reproducing the Chunky pre-generation and initial /voxy import workflow in Minecraft 26.2, comparing the missing ring with the result after moving through it or importing again. Trace the initial import and LOD ingestion path; done means the entire pre-generated area is available in Voxy's LODs after the first import.