code: def _render_meshes(self, rasterizer_class, shader_class):
      test = self
  
      class Model(nn.Module):
          def __init__(self, device):
              super(Model, self).__init__()
              mesh = ico_sphere(3).to(device)
              self.register_buffer("faces", mesh.faces_padded())
              self.renderer = self.init_render(device)
  
          def init_render(self, device):
              cameras = FoVPerspectiveCameras().to(device)
              raster_settings = RasterizationSettings(
                  image_size=128, blur_radius=0.0, faces_per_pixel=1
              )
              lights = PointLights(
                  ambient_color=((1.0, 1.0, 1.0),),
                  diffuse_color=((0, 0.0, 0),),
                  specular_color=((0.0, 0, 0),),
                  location=((0.0, 0.0, 1e5),),
              ).to(device)
              renderer = MeshRenderer(
                  rasterizer=rasterizer_class(
                      cameras=cameras, raster_settings=raster_settings
                  ),
                  shader=shader_class(cameras=cameras, lights=lights),
              )
              return renderer
  
          def forward(self, verts, texs):
              batch_size = verts.size(0)
              self.renderer = self.renderer.to(verts.device)
              tex = TexturesVertex(verts_features=texs)
              faces = self.faces.expand(batch_size, -1, -1).to(
                  verts.device
              )
              mesh = Meshes(verts, faces, tex).to(verts.device)
  
              test._check_mesh_renderer_props_on_device(
                  self.renderer, verts.device
              )
              img_render = self.renderer(mesh)
              return img_render[:, :, :, :3]
  
      # Make sure we use all GPUs in GPU_LIST by making the batch size 4 x GPU count.
      verts = (
          ico_sphere(3).verts_padded().expand(len(GPU_LIST) * 4, 642, 3)
      )
      texs = verts.new_ones(verts.shape)
      model = Model(device=GPU_LIST[0])
      model = nn.DataParallel(model, device_ids=GPU_LIST)
  
      # Test a few iterations
      for _ in range(100):
          model(verts, texs)
  
imports: import unittest
  import torch
  import torch.nn
  from pytorch3d.renderer import AlphaCompositor, BlendParams, HardGouraudShader, Materials, MeshRasterizer, MeshRenderer, PointLights, PointsRasterizationSettings, PointsRasterizer, PointsRenderer, RasterizationSettings, SoftPhongShader, SplatterPhongShader, TexturesVertex
  from pytorch3d.renderer.cameras import FoVPerspectiveCameras, look_at_view_transform
  from pytorch3d.renderer.opengl import MeshRasterizerOpenGL
  from pytorch3d.structures import Meshes, Pointclouds
  from pytorch3d.utils.ico_sphere import ico_sphere
  from .common_testing import TestCaseMixin
label_desc: Use image node_id 5 for calling the TestRenderMeshesMultiGPU obj's underlying member method code with example usage: obj._render_meshes(rasterizer_class, shader_class) and returns: renderer, img_render