PABretherton Hello again! When my animator exports their finished animation, combining all of the png's into 1 sprite sheet, the alpha channel seems to be adding a dark shadow effect: Is there an option to turn this off or is it a bug? Thank you! Best - PB
Misaki PABretherton This is the result of enabling the Premultiply alpha option in the texture packer settings. See the Spine User Guide for more information: https://esotericsoftware.com/spine-texture-packer#Premultiply-alpha If you do not need to use Premultiply alpha (PMA) or the Spine runtime you are using does not support PMA textures, simply uncheck it and pack as a straight alpha image.
PABretherton No worries. I thought changing the colours of the sprite sheet was something I could just do in Photoshop, seems you have to change the individual image files and re-export to get the desired result.
Misaki PABretherton I am afraid I am not sure what you are trying to do or where the problem still exists. If it seems too difficult to explain in words, please send us an email with the actual sprite sheet and we'll check it out what is wrong: contact@esotericsoftware.com
Nate Photoshop is likely to mess up PMA images. When opening the PNG, the colors won't look right in Photoshop and when it saves the PNG, it won't save with PMA.
PABretherton Hi @Nate I reckon you're spot on. There's an interesting conversation on this very topic over on the Adobe community forums. https://community.adobe.com/t5/photoshop-ecosystem-discussions/creating-premultiplied-alpha-channels-with-png-and-other-formats/m-p/5398312 Best wishes, PB
