Visualization problem: total dark surface without gridlines

[leoforeal]

Hallo,

I tried to visualize the mesh result of o3d.geometry.TriangleMesh.create_from_point_cloud_poisson(),

mesh, densities = o3d.geometry.TriangleMesh.create_from_point_cloud_poisson(pcd_normal, depth = 10, scale = 1.1, linear_fit = False )
and somehow it displayed a darkblack surface without the gridlines of the mesh (s. screenshot), can someone explain why or how I can adjust the parameter of visualization.draw_geometries() to display a mesh with gridline and perhaps another color of the surface.

Thank you all in advance!