It sounds like you're encountering an issue where mesh vertex animations are not being displayed correctly in the Skeleton Viewer, despite working as expected in the Spine Editor and when used by your developers. This discrepancy can be problematic, especially when using the Skeleton Viewer as a tool for quality assurance before sending files to outsourced developers.
The Skeleton Viewer is designed to display animations using the Spine Runtimes, similar to how they would appear in your game. However, there can be differences in how animations are rendered between the Spine Editor, the Skeleton Viewer, and the final game due to various factors, including the version of the Spine Runtimes being used and specific implementation details in the game engine.
Given the information provided, it's possible that the issue might be related to the specific version of the Skeleton Viewer or the Spine Runtimes you are using. It's also worth considering if there are any specific features or settings used in your Spine projects that might not be fully supported or might behave differently in the versions of the Skeleton Viewer you tested.
To address this issue, you could try the following steps:
- Ensure that you are using the latest version of the Spine Editor and the corresponding compatible version of the Skeleton Viewer. Sometimes, bugs or discrepancies are resolved in newer versions.
- If the issue persists with the latest versions, consider reporting this discrepancy to the Spine team. You can send them a detailed description of the issue, including the Spine project files and exports that demonstrate the problem, to contact@esotericsoftware.com. Mentioning the specific versions of the Spine Editor, Skeleton Viewer, and the Spine Runtimes you're using, as well as any relevant screenshots or examples, can help the Spine team diagnose and address the issue more effectively.
Unfortunately, without direct access to the Spine team's current bug tracking and feature request lists, I cannot confirm if this specific issue is already known or being addressed. However, reaching out to them directly with your findings and request for enhancement would be the best course of action.
