Colin Red Posted March 11, 2021 Share Posted March 11, 2021 Hi there, I am trying to understand the purpose of the 32 bit preview panel in the Develop Persona. When I make an adjustment to the exposure or gamma in the 32 bit preview panel and then commit the develop button, it records those adjustments in the Photo Persona. Below is from the help menu: it states that they are non-destructive. A little confused !!!! Seams to me they are an adjustment and not a preview. "The Preview Exposure and Preview Gamma options are non-destructive and only alter the presentation to screen, they do not affect the document's exposure or gamma. If you wish to modify the document, use an Exposure or Levels adjustment layer." Quote Link to comment Share on other sites More sharing options...
Staff James Ritson Posted March 11, 2021 Staff Share Posted March 11, 2021 Hi @Colin Red, are you doing any HDR authoring (as in, genuine high dynamic range, not tone mapped)? If not, you can safely ignore the panel as it doesn't apply to regular photo/image editing—it was introduced primarily for VFX workflows, then expanded upon when we brought in support for HDR display mapping. It's designed to allow people to visualise different areas of the large dynamic range that a RAW file (or other file formats) may contain—for example, bringing the exposure slider down will reveal bright highlight information that could not be shown on a traditional SDR (standard dynamic range) display, allowing you to examine it. Authors may also want to see how their images look under different gamma transform values. 41 minutes ago, Colin Red said: When I make an adjustment to the exposure or gamma in the 32 bit preview panel and then commit the develop button, it records those adjustments in the Photo Persona. Although this seems what's happening, it's because the 32-bit preview panel options carry over to the Photo Persona once you develop your RAW file. The Exposure and Gamma sliders are still non-destructive and only having an effect on the final screen presentation. Basically, unless you specifically need this panel for the workflow mentioned above, I'd recommend you to keep the sliders at their default values and use the Basic panel exposures to modify exposure, black point, brightness etc of your RAW files. Hope that helps! Quote Product Expert (Affinity Photo) & Product Expert Team Leader @JamesR_Affinity for tutorial sneak peeks and more Official Affinity Photo tutorials Link to comment Share on other sites More sharing options...
Colin Red Posted March 11, 2021 Author Share Posted March 11, 2021 Hi James, speedy response, your explanations help thank you. In answer to your question, I have done some exposure bracketing and have used the New HDR Merge feature a few times. I have always left the option in the panel checked for "Tone Map HDR image" I have never used the 32 bit preview panel before, so that panel is completely new to me :) Once again cheers Colin Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.