dkj Posted March 30, 2018 Share Posted March 30, 2018 What is the basic difference between a filter and an adjustment? I notice that Shadows/Highlights is available as both. Quote Link to comment Share on other sites More sharing options...
firstdefence Posted March 30, 2018 Share Posted March 30, 2018 One is non-destructive (Adjustments) and is editable at a later date by double-clicking on the adjustment layer, the other is not editable once applied (Filter) Quote iMac 27" 2019 Somona 14.3.1, iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9 (Please refrain from licking the screen while using this forum) Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions Link to comment Share on other sites More sharing options...
toltec Posted March 30, 2018 Share Posted March 30, 2018 14 minutes ago, firstdefence said: One is non-destructive (Adjustments) and is editable at a later date by double-clicking on the adjustment layer, the other is not editable once applied (Filter) Unless it's a Live Filter Layer, which is adjustable later. firstdefence 1 Quote Windows PCs. Photo and Designer, latest non-beta versions. Link to comment Share on other sites More sharing options...
dkj Posted March 30, 2018 Author Share Posted March 30, 2018 Yes, I should have said "adjustment and filter layers" in my original question. Quote Link to comment Share on other sites More sharing options...
toltec Posted March 30, 2018 Share Posted March 30, 2018 16 hours ago, dkj said: What is the basic difference between a filter and an adjustment? I notice that Shadows/Highlights is available as both. You know, that is a very good question. This is the best I can come up with but I have no doubt someone will have a better explanation. Basically, adjustments change the colours or exposure of the pixels (their values if you will). Filters mostly move (or rearrange) pixels. Like distorting or even sharpening and blurring. However, that is more a "what they do" explanation than a technical answer. Really, the Shadows / Highlight Filter or the Clarity Filter could perhaps be better classed as Adjustments. Anyone ? Quote Windows PCs. Photo and Designer, latest non-beta versions. Link to comment Share on other sites More sharing options...
lepr Posted March 31, 2018 Share Posted March 31, 2018 . R C-R and dkj 2 Quote Link to comment Share on other sites More sharing options...
dkj Posted April 1, 2018 Author Share Posted April 1, 2018 On 2018-03-31 at 5:27 AM, owenr said: An adjustment modifies the colour/opacity of a pixel without regarding its neighbouring pixels or computing a colour from a pattern/image to combine with it. Many filters modify a pixel by a function which uses several pixels in the neighbourhood of the pixel as input. You'll be aware of the radius parameter of blur and sharpening filters, and the Shadows/Highlights filter (not the Shadows & Highlights adjustment), which allows you to vary the size of the neighbourhood. The distortion filters such as Perspective or Ripple do not have a radius parameter, but the new colour/opacity of a pixel is determined from multiple pixels to reduce aliasing (jaggy edges). There are further types of filter such as those which add noise or the Lighting filter, which combine a computed pattern or image with the pixels. Thanks for this. So is this why live filter layers are nested by default: i.e. to keep them from having to compute what any other filter or adjustment layers have done to the original image? Quote Link to comment Share on other sites More sharing options...
lepr Posted April 1, 2018 Share Posted April 1, 2018 . Quote Link to comment Share on other sites More sharing options...
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