Renders a scene with specified avatar.

By default, use scene common/preview. Other available scenes can be found in render docs. Contact avaturn support for detailed instructions how to provide your own scenes.

The endpoint works the following way:

1. You send a request to the /renders/new endpoint
2. The endpoint creates a rendering task and responds with its id.
3. After rendering is completed, avaturn sends a render.ready webhook, which contains a task ID and a link to the rendering result.

<!-- If the `wait=true` query parameter is present, the response will contain `status='ready'` and the `render_url` will provide a link to the result. Note that a hard timeout (60 seconds) is applied. We recommend using this feature for convenience only. If you need robustness, switch to webhooks. -->

NOTE: Behavior of this endpoint for avatars created by direct photo upload and not yet opened via browser UNDEFINED and can be changed in the future. Set customization via corresponding endpoint to get predictable behaviour.