fail to rebuild radiance field. such as fox, lego

[garrisonz]

Figure 1. torch-ngp 300k step, loss 0.02 (16dB).

Figure 2. nerf2mesh 6k iters (1.7min), PNSR 25dB

Does torch-ngp do not support such scene? or any one work fine for such scene?
nerf2mesh is based on the framework of torch-npg, so I suppose they should have very close result.

[garrisonz]

lego scene is also fail.
any one know why or how to check? thanks.