VolumeSampler: expose padding_mode for inside out rendering #1638
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This exposes a setting on VolumeSampler so you can change the padding_mode. This is very useful when using cameras inside a volume that doesn't cover the entire world. By setting the value to
border
you can get much better behavior thanzeros
which causes edge effects for things like the sky. Border emulates infinitely tall buildings instead.Test plan:
Tested with torchdrive
Example before:

Example after:
