Render ONLY to texture buffer

General Discussion
1

Hi all,
I am working on implementing a kind of vision sensor where the picture should only be rendered into a buffer from which I can read it out and send it to OpenCV. While the general setup works, I am a little bit confused cause it seems I can only create a texture buffer (which I use because of its get_ram_image() method) after having created an output buffer. Even though I do not need the latter one if I want to run without visual output. In detail, my code looks like this:

	frame_buffer_properties = FrameBufferProperties.get_default()
	window_properties = WindowProperties.size(1, 1)

	graphics_engine = GraphicsEngine.get_global_ptr()
	selection = GraphicsPipeSelection.get_global_ptr()
	graphics_pipe = selection.make_default_pipe()

	buffer_stupid = graphics_engine.makeOutput(
		pipe=graphics_pipe,
		name='test camera',
		sort=0,
		fb_prop=frame_buffer_properties,
		win_prop=window_properties,
		flags=GraphicsPipe.BFRefuseWindow)

	buffer = buffer_stupid.make_texture_buffer(
		name='test',
		x_size=100,
		y_size=100,
		tex=Texture(),
		to_ram=True)

	display_region = self.buffer.make_display_region()

	self.cam = Camera('test camera')
	self.camera = self.world.render.attach_new_node(self.cam)

so later on, I can call

	texture = self.buffer.get_texture()
	ram = texture.get_ram_image()

My question is, whether I really need the buffer_stupid object and - if yes - why?

Thanks again for your help!
Best
Timo