Lab channels (split)

[PhotoHobby]

When converting the color profile in Affinity Photo 2 the channel background options: Background AOpponent, Background BOpponent and  Background Lightness are no longer available like they were in Affinty Photo 1. Is there another way to gain access to the grayscale layer and masking layer options in Affinity Photo 2?

[PhotoHobby]

I noticed the ARW file opened simply as file_name.ARW in AP2. In Affinity Photo 1 it was referred to as the background which enabled access to the above mentioned background  options discussed in the LAB tutorial. 

[RichardMH]

It works for me. Try clicking on something else like Info and clicking back to channels. 

 

The .ARW I suppose indicates you can go back to the develop persona and re edit the raw file if you've chosen  the right options.

[PhotoHobby]

Rasterizing the raw file will make the AOpponent, BOpponent and  LIghtness background channels available as in AP1. What was interesting was the  raw  file left unrasterized was measurably more saturated in AP2 than AP1. I'm not sure why the process has been changed but it may not  be a bug. 

[PhotoHobby]

While going directly to converting the raw document to LAB/16 in AP1 allowed me to get to the background properties assigned to the channel subcolors described above it didn't in AP2 to my knowledge. But when I followed James Reston's method to first assign the ROMM RGB color profile and then convert the document to LAB/16 the background: lightness, AOpponent  and BOpponent methods are still available in AP2. What's more the color profile is strikingly better when the correct steps are taken.  

[Callum]

Hi PhotoHobby,

I can't seem to replicate this problem here. Please could you confirm if this still occurs using 2.0.4?

Thanks
C

[PhotoHobby]

@Callum Just now checking with two  photos. This only applies to AP2 for the purpose of discussion.  I open an ARW file and go to develop  personna. I use ROMM RGB by default. I can currently at least change the profile from Document/convert doc/ICC Profile in the menu and a composite version of Lightness, AOpponent & BOpponent  are available  in Channels. If  I first rasterize the background file  which  for my purposes has not  carried over the naming convention from AP1 but instead simply refers to the open file as "Imagename.arw", than I get Composite versions of Lightness, AOpponent,  BOpponent plus  what used to appear in AP1  filename Lightness, filename AOpponen, filename  BOpponent. I"m quite certain there were no choices for  the LAB channel properties for Lightness, AOpponent  or BOpponent when I wrote the initial question unless  I rasterized the file.   For the sake of  discussion as  long as  I can  get the results I want from rasterizing I'm good. If there's anything else  let  me know.  Thanks...