[taichi] Fix missing volume render test

[erizmr]

Fix missing volume_render_test.py and update the deprecated annotation.

[erizmr]

Hi @ashawkey , it will be great appreciated if you can help review. Thanks!

[ashawkey]

Thanks!

[r530044129]

hi, I've updated this requests, but there is still some error.
ModuleNotFoundError: No module named '_freqencoder'
Do you have any thoughts about this?

[erizmr]

Hi @r530044129 , thanks for reporting this. Please refer to the fix PR #178.

[r530044129]

thanks, it's work. I get the validation pngs.
But when i finish training, i want to export the obj mesh, there is another problem

'python main.py --workspace rifle_01 -O --test --save_mesh'
this the the command that i have used

It's seems that there is no mesh or somehing?

[erizmr]

Hi @r530044129 , happy to hear that it works. The save_mesh has not been tested for the Taichi backend. According to the log info you provided, I think there are internal variables name mismatches between Taichi encoder and post-processing pipeline. I would like to file an issue and try to make it compatible.