Overlapping MObjects on ThreeDScene

[ANearchou]

How can I hide mobjects to the back when overlapping with other in 3D Scenes? Unless I'm doing something wrong, self.add_foreground_mobjects, self.bring_to_back and self.bring_to_front doesn't work.

How to reproduce the issue

class test(ThreeDScene):
    def construct(self):

        axes = ThreeDAxes()

        cir = Circle(radius = 0.5).move_to([-5,-5,0]).set_color("#FEFFAF")

        sphere = ParametricSurface(
            lambda u, v: np.array([
                2*np.cos(u)*np.cos(v),
                2*np.cos(u)*np.sin(v),
                2*np.sin(u)
            ]), v_min=0, v_max=2*PI, u_min=-PI/2, u_max=PI/2, fill_opacity = 1.0,
            checkerboard_colors=[RED_D], resolution=(6, 16), stroke_color = RED_D
        )

        self.set_camera_orientation(phi=75 * DEGREES, theta=30 * DEGREES)
        self.bring_to_back(cir)
        self.bring_to_front(sphere)
        self.add_foreground_mobjects(sphere)
        self.add(axes)
        self.add(cir)
        self.add(sphere)

        self.wait(1)

Output:

[citrusmunch]

in case anyone is having trouble with this, a workaround is to make the circle a skinny torus (and thus rendered in 3d)

from manim import *
import numpy as np


class test(ThreeDScene):
    def construct(self):

        axes = ThreeDAxes()
        cir = Torus(major_radius=0.5, minor_radius=0.01, fill_color="#FEFFAF").move_to(
            [-5, -5, 0]
        )
        sphere = Surface(
            lambda u, v: np.array(
                [2 * np.cos(u) * np.cos(v), 2 * np.cos(u) * np.sin(v), 2 * np.sin(u)]
            ),
            u_range=[0, 2 * PI],
            v_range=[-PI / 2, PI / 2],
            fill_opacity=1.0,
            checkerboard_colors=[RED_D],
            resolution=(6, 16),
            stroke_color=RED_D,
        )

        self.set_camera_orientation(phi=75 * DEGREES, theta=30 * DEGREES)
        self.add(axes)
        self.add(sphere)

        self.add(cir)

[citrusmunch]

#2032 seems to be the real fix;
also related to #2174

[ANearchou]

Yeap, closing this!