Depth maps black images

[AniketMan]

When doing a 3D animation and enabling save depth maps they are saved as black pngs. There is also not a checkbox and input value for the interpolate_key_frames values. I think both of these things are essential.

[Funofabot]

I agree that this is functionality that needs to be incorporated into the webui version.

[phi-line]

this has been fixed with https://github.com/deforum-art/deforum-for-automatic1111-webui/pull/156