Emissive Color not Working for TriangleMesh + MaterialRecord

FishWoWater commented 2 weeks ago

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 main branch).

Describe the issue

I am working with O3DVisualiser, when I set the base color of the material, it works normally. But the emissive color not working.

base color set to red

emissive color set to red

Steps to reproduce the bug

import open3d as o3d
from open3d.visualization import gui

app = gui.Application.instance
app.initialize()

viser = o3d.visualization.O3DVisualizer()
app.add_window(viser)

mesh = o3d.geometry.TriangleMesh.create_box()
mat = o3d.visualization.rendering.MaterialRecord()
# works
mat.base_color = [1.0, 0.0, 0.0, 1.0]
# not working
mat.emissive_color = [1.0, 0.0, 0.0, 1.0]

viser.add_geometry('__model__', mesh, mat)
gui.Application.instance.run()

Error message

No response

Expected behavior

When I set the emissive color of the cube to red, it should emit red light and display red color in the rendering, just similar to the behavior of the base_color.

Open3D, Python and System information

- Operating system: Windows 11 64-bit
- Python version: Python 3.10
- Open3D version: 0.18.0
- System architecture: x86_64
- Is this a remote workstation?: no
- How did you install Open3D?: pip