How to remove the default room background from the visualizer?

[peterzxli]

Checklist

• [X] I have searched for similar issues.
• [X] For Python issues, I have tested with the latest development wheel.
• [X] I have checked the release documentation and the latest documentation (for master branch).

My Question

Hi, how do I remove the default room background from the visualizer in python and C++? The room becomes visible on the surface of a reflective object.

Please refer to the example code and output below. Thanks!

import open3d as o3d
import open3d.visualization as vis
import numpy as np

sphere = o3d.geometry.TriangleMesh.create_sphere(1.0)
sphere.compute_vertex_normals()
sphere.translate(np.array([0, 0, 0]))
box = o3d.geometry.TriangleMesh.create_box(2, 4, 4)
box.translate(np.array([-1, -2, -2]))
box.compute_triangle_normals()

mat_sphere = vis.rendering.MaterialRecord()
mat_sphere.shader = 'defaultLit'
mat_sphere.base_color = [0.8, 0, 0, 1.0]

mat_box = vis.rendering.MaterialRecord()
mat_box.shader = 'defaultLitSSR'
mat_box.base_color = [0, 0, 0, 1.0] 
mat_box.base_roughness = 0.0
mat_box.base_reflectance = 1.0
mat_box.base_clearcoat = 0.0
mat_box.thickness = 4 
mat_box.transmission = 0.0
mat_box.absorption_distance = 1 
mat_box.absorption_color = [0, 1.0, 0] 
geoms = [{'name': 'sphere', 'geometry': sphere, 'material': mat_sphere},
         {'name': 'box', 'geometry': box, 'material': mat_box}]
vis.draw(geoms)

[yxlao]

Option 1

Try vis.draw(geoms, raw_mode=True) # Requires Open3D 0.15+

Option 2

Try vis.draw(geomes, show_skybox=False) # Requires Open3D 0.15+

Option 3

Turn it off from the GUI menu.

[peterzxli]

Thanks, but none of the options work. It seems that the room background is associated with the HDR map which can be turned off in the GUI. What API should I used to turn off the HDR map in C++?

[yxlao]

Thanks, but none of the options work.

Could you verify the Open3D version?

print(o3d.__version__)

Could you post a screenshot when you try Option 1?

[errissa]

Option 1 should have disabled the HDR map. Can you post a screenshot? Are you using 0.15?

In C++ you can use the EnableIndirectLighting of the Scene class to enable/disable HDR lighting.

[peterzxli]

Hi, I am on version 0.15.2. The visualizer crashes for option 1.

[yxlao]

@errissa Shall we also add this option (and other options) to the C++ open3d::visualization::Draw()?

[yxlao]

Ah, @peterzxli I think I now got what you mean. There are two things:

1. The room that gets reflected by the mesh surface.
2. The skybox (the blue thing in the background).

You want to remove 1. @errissa could probably help you with that.

[peterzxli]

@errissa I cannot find EnableIndirectLighting in open3d::visualization::rendering::Open3DScene class that I am using in C++. Can you please let me know how to achieve the same functionality in this class?

@yxlao Thanks for your help as well!

[errissa]

@peterzxli It’s a method of the low-level Scene class. You can get from the Open3DScene class with the GetScene method.

[peterzxli]

@errissa Thanks! On the C++ side, I am still seeing some undesirable gradient in the background if the box is viewed at a certain perspective. I use the following visualization setting and see the following results:

Can you please let me know how to resolve this? Thanks again!

mat.shader = "defaultLitSSR";
mat.base_color << 0, 0, 0, 1;
mat.base_roughness = 0.0;
mat.base_reflectance = 0.0;
mat.base_clearcoat = 0.0;
mat.thickness = 4;
mat.transmission = 0.8;
mat.absorption_distance = 1;
mat.absorption_color << 0, 1, 0;
auto test_box = open3d::geometry::TriangleMesh::CreateBox(5,5,5);
this->widget3d_->GetScene()->AddGeometry("bbox", test_box.get(), mat);
this->widget3d_->GetScene()->GetScene()->EnableIndirectLight(false);
this->widget3d_->GetScene()->ShowSkybox(false);

Desirable result (when viewed at some perspectives):

Undesirable result (when viewed at some other perspectives):

[errissa]

@peterzxli I will look into this but this looks like it could be the correct behavior given the material settings. In the meantime, if you haven't already please review the Filament material guide to make sure you're setting the material properties correctly for your desired result.

[peterzxli]

This behavior only appears in C++ (not python). It looks like there is a ground plane with a darker color hidden in the background. I turned the ground plane off though.