code: def to_color(self):
          
          # find the color at each UV coordinate
          colors = self.material.to_color(self.uv)
          # create ColorVisuals from result
          vis = color.ColorVisuals(vertex_colors=colors)
          return vis
docs: Convert textured visuals to a ColorVisuals with vertex
          color calculated from texture.
  
          Returns
          -----------
          vis : trimesh.visuals.ColorVisuals
            Contains vertex color from texture