Added drop-down for selecting environment map

[stymbhrdwj]

Modified gui.py by adding a drop-down for changing environment map lighting. This allows us to visualize the relighting results on-the-fly in real-time. While global_light is correctly changed, there is no change to local_light when changing the environment map. Is this the desired behaviour?

[HarryPeverell]

Thanks for your great work!

I am reaching out with a question regarding the implementation of real-time ray tracing. Is it feasible to perform real-time rendering of ray tracing and display the results within the GUI? I am particularly interested in understanding the current limitations and potential solutions that might enable this technology to be more accessible and interactive.

Thank you for your time and consideration.

[ArisPan]

Hello and thanks for your contribution!

I tried running gui_relighting.py for both DTU and NeRF Synthetic. I am getting two errors:

1. NameError: name 'env_light' is not defined

C:\Users\user\miniconda3\envs\r3dg\lib
Rendering output/NeRF_Syn/chair/3dgs
cannot find env_light_checkpoint at output/NeRF_Syn/chair/3dgs\env_light_chkpnt30000.pth, and env light will be ignore.
Update visibility with raytracing.: 100%|████████████████████████████████████████████████| 4/4 [00:03<00:00,  1.25it/s]
Traceback (most recent call last):
  File "gui_relighting.py", line 434, in <module>
    "env_light": env_light,
NameError: name 'env_light' is not defined

2. TypeError: render() got an unexpected keyword argument 'bake'
   The following error occurs with the offending line 434 from the previous error removed.

C:\Users\user\miniconda3\envs\r3dg\lib
Rendering output/NeRF_Syn/chair/3dgs
cannot find env_light_checkpoint at output/NeRF_Syn/chair/3dgs\env_light_chkpnt30000.pth, and env light will be ignore.
Update visibility with raytracing.: 100%|████████████████████████████████████████████████| 4/4 [00:07<00:00,  1.76s/it]
Traceback (most recent call last):
  File "gui_relighting.py", line 443, in <module>
    mode='pbr')
  File "gui_relighting.py", line 132, in __init__
    self.step()
  File "gui_relighting.py", line 185, in step
    render_pkg = self.render_fn(viewpoint_camera=self.custom_cam, **self.render_kwargs)
TypeError: render() got an unexpected keyword argument 'bake'

I have tried running with and without the -t flag and as mentioned, with both DTU and Nerf Synthetic. The cannot find env_light_checkpoint warning is also observed with gui.py which runs as expected. Do you have any recommendations on these issues? Could you add an example of running gui_relighting.py?

Thank you very much!