How to not display the xyz axis of the world frame in the rendered picture.

[hermosaaurora]

System:

• OS version: Ubuntu 20.04
• Python version (if applicable): Python 3.7.16
• SAPIEN version (pip freeze | grep sapien): 2.1.0
• Environment: Server with xvfb

Describe the bug
Why are there always x/y/z axis of the world frame in the rendered picture? How can I exclude them or resize their thickness in my rendered pictures?

To Reproduce
Steps to reproduce the behavior (use pastebin for code):

def get_rgb(self):
        self.camera.take_picture()
        rgba = self.camera.get_float_texture('Color')
        rgba = (rgba * 255).clip(0, 255).astype(np.float32) / 255
        white = np.ones((rgba.shape[0], rgba.shape[1], 3), dtype=np.float32)
        mask = np.tile(rgba[:, :, 3:4], [1, 1, 3])
        rgb = rgba[:, :, :3] * mask + white * (1 - mask)
        return rgb

Expected behavior
I expect the axis can be excluded from the pictures

[hermosaaurora]

I know where the bug is. To show the gui, I follow the example code in your documentation and set the Viewer. I add the two lines of code in my project:

self.viewer = Viewer(self.renderer)
self.viewer.set_scene(scene=self.scene)

if I comment out the codes, then the rendered images will be with no axes. So I take a skim at the set_scene's implementation:

SAPIEN/python/py_package/utils/viewer.py

Lines 1977 to 1983 in ab1d9a9

	self.scene = scene
	self.window.set_scene(scene)
	self.fps_camera_controller = FPSCameraController(self.window)
	self.arc_camera_controller = ArcRotateCameraController(self.window)
	self.create_visual_objects()
	self.toggle_axes(True)
	self.set_fovy(np.pi / 2)

as you can see in line 1982, the argument of self.toggle_axes is always True. I think there can be an option for the user to decide whether they want the axes to be shown.