# Special Considerations **Limitations and Constraints** Some platforms require additional care when packaging assets. Platforms such as the Meta Quest or WebGL require assets to be optimized for speed and size. Failing to keep these considerations in mind can lead to poor experiences caused by inconsistent framerate and slow loading times. In addition to optimizing assets, the following platforms require additional care and attention: * VisionOS * For all mesh assets, the asset must have Read/Write enabled in the model settings. The [model import settings](https://docs.unity3d.com/Manual/class-FBXImporter.html) can be found by clicking on the model asset file (FBX/OBJ/ETC) in the Unity Project Folder. Failure to mark the asset as Read/Write will cause HyperSkill to close automatically when trying to load the asset in experience mode. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.siminsights.com/virtual-entities-vx/vx-publisher/special-considerations.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.