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Hi,

I'm using Affinity Photo to edit hand painted textures for game use. I'm trying to separate out the painted stuff and generate a clean, solid alpha channel for game use, that is, no grays except for antialiasing at the very edges. In PS, I'd grab the red or blue channel, up the contrast, clean any dust or blips and use that as the alpha. In Affinity, when I try the Filter>Erase White Paper I get a subtle transparency in the stuff that should be opaque, and a subtle haze/translucency in the stuff that should be invisible in the game. Any suggestions for a quick workflow that would clear out something like this? I would think it would be easy, but I'm pretty new and can't figure out the steps. Thanks in advance!

PineTuft 1.jpg

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You try this method I've just worked out.

  • Select a curves adjustment and set it to look like this

583374469_ScreenShot2019-09-30at08_32_54.png.09d42706655929756df06d7e3c5d2c13.png

  • Right click on the curves adjustment layer and select merge down
  • Press Option + Command and click on the background layer
  • Go to Filters > Colours > Erase white paper
  • test cleanness by dropping a fill layer with black underneath the background layer.

iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9  
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Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions

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1
7 hours ago, firstdefence said:
  • Select a Levels Curves adjustment and set it to look like this
  • Right click on the levels Curves adjustment layer and select merge down

 

To save time I am currently using an automated AI to reply to some posts on this forum. If any of "my" posts are wrong or appear to be total b*ll*cks they are the ones generated by the AI. If correct they were probably mine. I apologise for any mistakes made by my AI - I'm sure it will improve with time.

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I was never here ;)

iMac 27" 2019 Sequoia 15.0 (24A335), iMac 27" Affinity Designer, Photo & Publisher V1 & V2, Adobe, Inkscape, Vectorstyler, Blender, C4D, Sketchup + more... XP-Pen Artist-22E, - iPad Pro 12.9  
B| (Please refrain from licking the screen while using this forum)

Affinity Help - Affinity Desktop Tutorials - Feedback - FAQ - most asked questions

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On 9/30/2019 at 1:15 PM, firstdefence said:

I was never here ;)

Who said that? :o

All 3 1.10.8, & all 3 V2.5.5 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
A
ll 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7

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