[Sidefx-houdini-list] Film at 16 bit

Peter Robbinson probbins at sympatico.ca
Fri Mar 7 17:43:28 EST 2008

Wow, that's a hell of a lot of useful information in a very few words.

Thanks Mark!


Mark Alexander wrote:
> Both 16b Int and 32b FP are XMMX and SSE optimized. 16b FP is the 
> slowest of the bunch, being a format that is not native to the CPU (it 
> is pretty much always up-converted to FP32). 16b Int is probably the 
> most work, since you have to worry about the white point (setting it 
> somewhere around 4000 for really HDR stuff).
> However, you can save all your files in 16b FP and force the compositor 
> to load them as FP32 files. Edit->Composite Project Settings, "Pixel 
> Format" = "32 bit FP" and "File Operators use the Project Pixel Depth by 
> Default" = "On". That save disk space and network bandwidth, while 
> optimizing performance in COPs by comp'ing everything in 32b FP. You can 
> still save out 16b FP files at the end without any problems.
> Cheers,
> M.
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