render_data() bug when a single mesh has multiple materials about bpycv

[DIYer22]

By right now, object that has multi-materials are not support well.
After rendering annotations, only one material will recover to the object.
The temporary approach is reloading all objects after rendering annotations.
We will fix this issue soon by render annotations in another way.

[mitchelljy]

Thanks @DIYer22

I ended up being able to work around this problem temporarily by modifying the library to support an 'ignore object' argument whereby I could pass in a list of object names (or a prefix for object names) and all matching objects would be totally ignored by the library. This worked for me because I didn't need the city object to be included in the object mask, it could be treated as background.

If you happen to have the same issue as me before a more reliable fix is implemented then this may work for you too 😄

[jessicametzger]

I am having trouble with this, and unfortunately need to render tracked objects with multiple materials (i.e. have bpycv pay attention to them). Any updates would be great.