Function render_command 

pub fn render_command(
    app: &App,
    scene_name: &str,
    buffer_count: usize,
) -> Result<()>

Available on crate feature cmd-render and non-target_family=wasm only.

Render a single scene once with default output settings (1920x1080, 60 fps, mp4). Unlike output_command, this command does not read any #[output(...)] declaration and does not process TimeMark::Capture.