Giggly Posted December 14, 2021 Share Posted December 14, 2021 i have an image of clouds with a blue sky. is there a way to change blue sky to transparent leaving only the clouds? Quote Link to comment Share on other sites More sharing options...
Ron P. Posted December 14, 2021 Share Posted December 14, 2021 Yes there is, however how easy/difficult depends on how complex. Can you provide a screenshot or attach a file so we can see what you're dealing with? Also which APP? Quote Affinity Photo 2.4..; Affinity Designer 2.4..; Affinity Publisher 2.4..; Affinity2 Beta versions. Affinity Photo,Designer 1.10.6.1605 Win10 Home Version:21H2, Build: 19044.1766: Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz, 3301 Mhz, 6 Core(s), 12 Logical Processor(s);32GB Ram, Nvidia GTX 3070, 3-Internal HDD (1 Crucial MX5000 1TB, 1-Crucial MX5000 500GB, 1-WD 1 TB), 4 External HDD Link to comment Share on other sites More sharing options...
Giggly Posted December 14, 2021 Author Share Posted December 14, 2021 i have all three Affinity program s and have attached a small section of the image. Quote Link to comment Share on other sites More sharing options...
prophet Posted December 14, 2021 Share Posted December 14, 2021 My technique… • Make a white pixel layer • "Rasterize to mask" the original image and make it the child of the white layer • Add a Levels adjustment to the mask, set to only affect the Alpha, to be able to play with the black/white balance. • The colored layer at the the stack bottom is to show the transparency has been achieved. carl123 1 Quote Link to comment Share on other sites More sharing options...
Giggly Posted December 14, 2021 Author Share Posted December 14, 2021 prophet, that seems to be working. i have a lot of exploring to do. thx! Quote Link to comment Share on other sites More sharing options...
prophet Posted December 14, 2021 Share Posted December 14, 2021 Happy to help. Quote Link to comment Share on other sites More sharing options...
Giggly Posted December 14, 2021 Author Share Posted December 14, 2021 can you explain how that works? did creating the white pixel layer somehow only keep white pixels? i'm wondering if the same technique could be used to selectively keep/remove other colors? Quote Link to comment Share on other sites More sharing options...
prophet Posted December 14, 2021 Share Posted December 14, 2021 The white fill layer acts as the base for the mask. It is only white because the clouds "should" be white. It could be any color or other image really. Quote Link to comment Share on other sites More sharing options...
firstdefence Posted December 14, 2021 Share Posted December 14, 2021 Just answered another post on a similar ask, I made a macro for it but for your image I had to invert the layer first to get it to turn the blue transparent...BG to Trans Inverted.afmacro This is the Macro for the other postBackground to transparency.afmacro Quote iMac 27" 2019 Somona 14.4.1, 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...
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