There are a number of examples for custom renderers in the UntitledImGuiFramework that you can use:

1. Basic OpenGL - Built-in OpenGL renderer
2. Basic Vulkan - Built-in Vulkan renderer
3. Basic WebGPU - Built-in WebGPU renderer
4. UImGuiBgfx - A custom renderer using bgfx. Used in a number of unreleased projects, as well as for regression testing of the pluggable renderer API using the OpenGL, DX11, DX12 and Metal backends.

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