Tiff 32 Bit Float Export reduces bit depth?

Software RawTherapee
1

Hello everyone!

I am relatively new to RawTherapee and have a question about the ‘Tiff 32 Bit Float’ export option.

My plan is to work on the RAW files of bracketed photos in RawTherapee and later stitch them together to a 360° HDR using PTGui.
So I adjust the White Balance and remove Chromatic Aberration on one photo in RawTherapee, copy-paste the changes onto every photo that I need for the brackets and export every photo as an uncompressed 32 Bit Float TIFF.

I stitch them together in PTGui and everything seemed fine but when ich checked for the highlights in the HDR I noticed that the bit depth of the originals was pretty much gone.
Does the uncompressed TIFF Export reduce bit depth even if I select 32 Bit Float Export?

I tried again to work with the original RAW files in PTGui and then everything worked fine, so I’m definitely doing something wrong in RawTherapee.

Thanks a lot for your help!

2

Moin!

I am not sure, but perhaps this might assist?

https://rawpedia.rawtherapee.com/index.php?search=tiff+32&title=Special%3ASearch&go=Go

MfG
Claes in Lund, Schweden

3

Clipping and bit depth are not necessarily related.

I guess you need to check the export profile, you want the linear “unclipped” one when exporting to float.

3 Likes
4

Hi @Schnagn,

I’ve documented my current RT 32b workflow here.

HTH,
Flössie

1 Like