About the input image and some config params

[sadexcavator]

Hi, I have some questions about the the input image and several config params setting.

1. As you said in How to adjust mesh_scale to custom object? #77 "Best results are obtained when the object covers most of the screen." I want to know that what the proportion of objects in the picture should be for better results? more than 50% or 75%?
2. And what about the 'dmtet_grid' and 'mesh_scale' setting idea? Does it simply means that for the bigger object I should set bigger 'dmtet_grid' and 'mesh_scale'? . Typically what value should I set for these two params? Could you please share some idea about their setting tricks?
   THANK YOU!

[jmunkberg]

Hello.

1. Best results are obtained if the entire object is covering the screen, but not clipping the screen borders in any of the views. So 100%. See the nerf synthetic datasets for examples.

2. From https://github.com/NVlabs/nvdiffrec/blob/main/train.py#L502

    FLAGS.dmtet_grid          = 64                       # Resolution of initial tet grid. We provide 64 and 128 resolution grids. Other resolutions can be generated with https://github.com/crawforddoran/quartet
    FLAGS.mesh_scale          = 2.1                      # Scale of tet grid box. Adjust to cover the model

Higher values of dmtet_grid generates a more dense triangle mesh.