# Advanced Topics

- [Render Pipelines](https://doc.realvirtual.io/advanced-topics/render-pipelines.md): Improving visual quality of your Digital Twins
- [Mixed Reality with Meta Quest3](https://doc.realvirtual.io/advanced-topics/mixed-reality-with-meta-quest3.md): Using realvirtual.io and Meta Quest 3 - A Quick Guide
- [Upgrade Guide](https://doc.realvirtual.io/advanced-topics/upgrade-guide.md)
- [Upgrade to 2022](https://doc.realvirtual.io/advanced-topics/upgrade-guide/upgrade-to-2022.md): Upgrading from realvirtual (game4automation) 2021 to 2022
- [Open Digital Twin Interface](https://doc.realvirtual.io/advanced-topics/page-5.md): Version 1 - Connecting Digital Twin design and simulation applications
- [Useful Addons](https://doc.realvirtual.io/advanced-topics/useful-addons.md): Unity provides an enormous solution eco system
- [Improving Performance](https://doc.realvirtual.io/advanced-topics/improving-performance.md)
- [Supported Platforms](https://doc.realvirtual.io/advanced-topics/supported-platforms.md)
- [Compiler Defines](https://doc.realvirtual.io/advanced-topics/compiler-defines.md)
- [For Developers](https://doc.realvirtual.io/advanced-topics/for-developers.md)
- [Important Classes and Interfaces](https://doc.realvirtual.io/advanced-topics/for-developers/important-classes-and-interfaces.md)
- [Assembly Definitions](https://doc.realvirtual.io/advanced-topics/for-developers/assembly-definitions.md)
- [Starting your development](https://doc.realvirtual.io/advanced-topics/for-developers/starting-your-development.md): Developing your own custom digital twin solutions with c#
- [Class documentation](https://doc.realvirtual.io/advanced-topics/for-developers/class-documentation.md)
- [realvirtual Init Sequence](https://doc.realvirtual.io/advanced-topics/for-developers/realvirtual-init-sequence.md): Only Version 6.1.4+
- [realvirtualBehavior Lifetime Methods](https://doc.realvirtual.io/advanced-topics/for-developers/realvirtualbehavior-lifetime-methods.md)
- [Testing](https://doc.realvirtual.io/advanced-topics/for-developers/testing.md): Test automation for Digital Twins
- [Newtonsoft JSON](https://doc.realvirtual.io/advanced-topics/newtonsoft-json.md)
- [Troubleshooting](https://doc.realvirtual.io/advanced-topics/troubleshooting.md)


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