mapbox / mapbox/mapbox-gl-js

Enabling terrain causes abnormal display of symbol type layers, especially when the 'examination' parameter is particularly large

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auto-triaged bug :lady_beetle:
Dominant language
TypeScript
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Description

### mapbox-gl-js version

v3.15.0

### Browser and version

Microsoft Edge 140.0.3485.81

### Expected behavior

The expected situation is to keep the text layer at the top level

### Actual behavior

Enabling terrain will overwrite the text layer

### Link to the demonstration

_No response_

### Steps to trigger the unexpected behavior

This is the obscured text layer
Image
Enabling terrain will cause occlusion

### Relevant log output

```shell

```

Contributor guide

Open the contributing guide

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 issue in mapbox-gl-js v3.15.0 with terrain enabled and a large “examination” parameter, using the supplied screenshot as the expected visual reference. Trace the symbol/text layer rendering path to determine why terrain occludes the text layer; done means the text layer remains at the top level when terrain is enabled.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
computer-graphics, frontend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
32/100

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