new_contents: import numpy as np
  
  import matplotlib.pyplot as plt
  # import mpl_toolkits.mplot3d.art3d as art3d
  from matplotlib.patches import Polygon
  # from mpl_toolkits.mplot3d import Axes3D
  
  __all__ = ["render_problem"]
  
  def render_problem(p, ax):
      solids = p.domain.solids
      source = p.source
      detectors = p.detectors
  
      # Generate the patches for the buildings
      building_patches = [
          Polygon(s.vertices)
          for s in solids
      ]
  
      for patch in building_patches:
          ax.add_patch(patch)
  
subject: Add plots package