MCRcortex / MCRcortex/voxy

Shader Support: lightmap sampler not reading correctly

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Dominant language
Java
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Description

When adding shader support, the vanilla lightmap texture doesn't load right. The params.lightMap coordinates are fine, but the actual lightmap sampler isn't reading right. This makes a shader that uses the lightmap texture at all not look right in Voxy (the LODs are black in overworld, darker than usual in end and nether. I know being able to look vanilla in shaders might not be a priority, but I do hope this can be fixed. Thanks!

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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

No file or test entry point is named. Start by locating the shader-support code and tracing how the vanilla lightmap sampler is read, then compare its behavior across the overworld, end, and nether. Done means shaders using the lightmap texture render LODs with the expected brightness in all three dimensions.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
computer-graphics, game-dev
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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