A node that copies a region of the screen to a buffer for access in shader code. Node for back-buffering the currently-displayed screen. The region defined in the [BackBufferCopy] node is buffered with the content of the screen it covers, or the entire screen according to the [member copy_mode]. It can be accessed in shader scripts using the screen texture (i.e. a uniform sampler with [code]hint_screen_texture[/code]). [b]Note:[/b] Since this node inherits from [Node2D] (and not [Control]), anchors and margins won't apply to child [Control]-derived nodes. This can be problematic when resizing the window. To avoid this, add [Control]-derived nodes as [i]siblings[/i] to the [BackBufferCopy] node instead of adding them as children. $DOCS_URL/tutorials/shaders/screen-reading_shaders.html Buffer mode. See [enum CopyMode] constants. The area covered by the [BackBufferCopy]. Only used if [member copy_mode] is [constant COPY_MODE_RECT]. Disables the buffering mode. This means the [BackBufferCopy] node will directly use the portion of screen it covers. [BackBufferCopy] buffers a rectangular region. [BackBufferCopy] buffers the entire screen.