Jump to content
Our response time is longer than usual currently. We're working to answer users as quickly as possible and thank you for your continued patience.

No Gaussian Blur when Preserve alpha get's checked


Recommended Posts

There is no blur if Preserve Alpha is activated.

The live filter is also not non-destructive. If the filter gets reopened by double click, the checkbox for Preserve alpha is no longer there.

FYC: The YT video link is set to hidden.

The video explains it all:

 

Roland Rick

Roland Rick Photography
Pipobike Mountainbike Guide and Driving Instructor

iMac 27 5K Retina (Late 2013), MBP 15" Retina (Something 2013), MBP13" Retina (Early 2015)

Link to comment
Share on other sites

Can you check if the pixel layer has partially transparent pixels? This will irritating any “preserve alpha”, as pixels with alpha below a certain threshold will be rated as an edge, and consequently the blur effect gets removed over large areas, or the overall layer.

just add a rectangular shape with a fill in the color of the background as parent, and nest your pixel layer into it. The blur must be applied to the parent layer, preferably as live filter.

the screenshots shows this exact situation. There is one blur filter with protect alpha.

only the areas with the white rectangles get blurred, the left top is spared.

63435409-629C-41CC-849A-E22529001C33.png

blur protect alpha.afphoto

Mac mini M1 A2348

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

 

Link to comment
Share on other sites

  • Moderators

Hi @Roland Rick,
The preserve alpha checkbox disappearing issue is now with dev to be looked at.
Regarding the preserve alpha not working, this is by design due to the presence of transparence pixels / areas within the pixel layer (because it was painted with a textured brush which didn't fully filled the layer leaving the aforementioned semi-transparent area within the layer. This can be clearly seen from the thumbnail of the pixel layer in your video where the checkerboard pattern is also present/over the painted areas. If you add a new layer below, filled with a solid white or light grey color and merge the two layers to fill in those semi transparent areas in the original layer, the Gaussian Blur - Preserve alpha option will work as you are expecting.
If you want/need to keep the original layer without merging, you can do as NotMyFault explained above clipping the painted/textured layer to the solid colour layer and applying the FX or Live filter to the solid colour layer (parent).

Link to comment
Share on other sites

  • 2 weeks later...

Thanks to @MEB and @NotMyFault for all the hints, but it's kinda quite a workaround. I attached a psd, none of the elements I blurred gets this bevel effect at the images edges. And I'm pretty sure, 99.99% of Affinity Photo users don't want it either ;)

https://assets.adobe.com/id/urn:aaid:sc:EU:06229e7c-ce76-422c-bd73-0af28e1f3704?view=difile

If the link doesn't work and/or you can't download the file, please let me know.

Roland Rick

Roland Rick Photography
Pipobike Mountainbike Guide and Driving Instructor

iMac 27 5K Retina (Late 2013), MBP 15" Retina (Something 2013), MBP13" Retina (Early 2015)

Link to comment
Share on other sites

  • Moderators

Hi @Roland Rick,
I've raised this with the dev team to learn if there's some technical limitation or if it can be improved. Meanwhile if you use a destructive Gaussian Blur filter (from the filters menu) it should work as you are expecting which I believe is the equivalent of what Photoshop is doing.

Link to comment
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.

Guest
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.

Loading...
 Share

×
×
  • Create New...

Important Information

Please note there is currently a delay in replying to some post. See pinned thread in the Questions forum. 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.