Jump to content
Jayden Brand

Curves Creating Glitched Images

Recommended Posts

Hey there :)

Whenever I try to use curves in Develop Persona, the images I work on get these glitches and I can't see what the image is going to look like.


Let me take you through my process, maybe I am doing something wrong...


I open a RAW file into Affinity Photo (Taken on Canon 700d)

I do basic edits under 'basic,' such as contrast, saturation, shadows and highlight (etc.)

I then move over into 'lens,' and load a basic preset that I have created in there.

I then move over to 'details,' and load another preset, and adjust where necessary.

Then, depending on what I want to achieve with the image, I move over into 'tones,' and mostly convert to black and white.


But whenever I try to use curves, the same thing always happens (Check the images below, but specifically the shadows in the second image)

(Please note photograph is for explanatory purposes and is not the most striking image)


Thanks peoples :)


Example 1.png

Example 2.png

Share this post

Link to post
Share on other sites

Hi Jayden Brand,

Would you be able to record a video showing the process from opening the file through to getting the issue please? I've just had a quick try myself with an EOS 700d image and couldn't reproduce. Seeing all the settings you're applying will help to see where something might be going wrong!


Share this post

Link to post
Share on other sites

Thanks for the file! Unfortunately I'm still struggling to reproduce this! Would you be able to try a few more things for me please?

After getting the problem, could you try disabling each checkbox (except for Curves) and find out which one makes it go away? Once you've done that could you set all the Presets to 'Default' close and reopen the file and then follow your steps in the video, but instead of selecting the presets just applying the values that are seen in your video. This is what I've done to try and reproduce it, as obviously I don't have your presets, but cannot reproduce it.

Lastly could you post screenshots of your Develop Assistants dialog and also your Preferences > Performance dialog as well please? Also what is your machine specs?


Share this post

Link to post
Share on other sites

Hey Sean

So I have done some tests, and I have found out some pretty interesting things. (Sorry that its taken a while, I’ve been pretty busy)

I’ve done multiple tests, and I found out that ‘Detail Refinement’ under ‘Details’ is the culprit.

I’ve tried multiple settings, color and black & white.

I’ve taken all my presets off and adjusted the image manually, and everything seems to be fine except when I turn on ‘Detail Refinement.’


I’ll attach a video below so that you can see it, and it seems to be distorting the image whenever a color becomes completely underexposed (completely black).

But then I tested the highlights, and a similar result was produced, but not as exaggerated.



So, what I have discovered is that ‘Detail Refinement’ and ‘Curves’ are clashing.


My specs are:

MacBook Air (11 inch, Early 2014)

Processor: 1,4 GHz Intel Core i5

Memory: 4GB 1600 Mhz DDR3

Graphics: Intel HD Graphics 5000 1536MB

Do you need my serial number?


Affinity Photo is updated to the latest software release, version 1.6.7


Is there anything else that you need?


Thanks Sean

Share this post

Link to post
Share on other sites

Thanks for the screenshots - I've reproduced it here (finally!) and the key components were Contrast, Curves, Detail Refinement and ALSO having Raw output format set to RGB (32 bit). Setting this to RGB (16 bit) makes the problem go away.

I'll get this passed on to development!

Share this post

Link to post
Share on other sites

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.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

Please note the Annual Company Closure section in the Terms of Use. These are the Terms of Use you will be asked to agree to if you join the forum. | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.