# Limitations

As with all platforms, here are the current limitations you should keep in mind while building your Metaverse on GMetri:

* [iOS Limitations](/guidelines-compatibility/limitations/ios-support.md)
* [VR Mode Limitations](/guidelines-compatibility/limitations/vr-mode-support.md)
* In [Multiplayer ](/metaverse/multiplayer.md#multiplayer-mode)Mode: [Concurrency](/metaverse/player/concurrency.md#room-concurrency-limit)
* Asset Limitations:
  * [Supported File Types](/guidelines-compatibility/compatibility/supported-file-formats.md)
  * Images: r[esolution limits](/guidelines-compatibility/guidelines/experience-optimizations/image-optimizations.md#image-resolution-and-file-size-recommendation)
  * Audio: [audio autostart limitation](/guidelines-compatibility/guidelines/experience-optimizations/audio-optimizations.md#audio-autostart-limitations), [number of audio elements](/guidelines-compatibility/guidelines/experience-optimizations/audio-optimizations.md#audio-limitations), [maximum conurrent audio](/guidelines-compatibility/guidelines/experience-optimizations/audio-optimizations.md#video-number-of-parallel-streams)
  * Video: [resolution limits](/guidelines-compatibility/guidelines/experience-optimizations/video-optimizations.md#videos), [maximum concurrent video](/guidelines-compatibility/guidelines/experience-optimizations/video-optimizations.md#video-number-of-parallel-streams)
  * 3D Models: [max polycount recommendation](/guidelines-compatibility/guidelines/asset-guidelines/3d-modelling-guidelines.md#3d-model-recommendations)


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