loading an initial guess instead of sphere

[maorp]

Hi, thanks for this amazing work! I'm trying to use an initial mesh of a complex scene instead of optimizing from a sphere. I don't have masks and the optimization takes above 2 hours to reach reasonable results. I'm thinking maybe replace/changing loss_sphere_init function used in the first iters of train...

[maorp]

i mean i have some good initial depthmaps/3d model. i get good results even when using optmization factor 0.5 but still it sounds intuitive that init model improve runtime because we only need to focus rays around and close to it