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Patrick Mours a8c81ffa83 Cycles: Add half precision float support for volumes with NanoVDB ...

This patch makes it possible to change the precision with which to
store volume data in the NanoVDB data structure (as float, half, or
using variable bit quantization) via the previously unused precision
field in the volume data block.
It makes it possible to further reduce memory usage during
rendering, at a slight cost to the visual detail of a volume.

Differential Revision: https://developer.blender.org/D10023

2022-05-23 19:08:01 +02:00

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