how to extract mesh of brandenburg_gate successfully?

[LongruiDong]

Hi~

Thanks for sharing this great code.

I have tried to adapt extract_mesh.ipynb to extract mesh from learned nerf-w model. after seen the notes , I first get the bounds of point cloud from dataset.xyz_world:

x y z min:
 [-1.58000625 -1.41236581 -0.89322236]
x y z max:
 [ 3.32392681  2.49776899 10.96546297]

so I set bound params of this scene like:

xmin, xmax = -7, 16 # left/right range -1.2 1.2
ymin, ymax = -7, 16 # forward/backward range
zmin, zmax = -7, 16 # up/down range

however, the mesh is unreasonable:

have anyone made it ?