Hi,
I use PNG Icons with a transparent background in my toolbar. Everything looks good on the Mac.
Under windows 10 the background of the icon is no longer transparent, but white.
I didn’t find any settings.
What can I do, another Icon format?
Check build settings Supports Hi-DPI, I think yours is OFF.
Did a little test with Julian’s image and Hi-DPI OFF and it shows white background, changed that to ON and then is transparent. Running Windows 10 on Virtualbox.
Edit: it looks like a bug with normal images. I started a second test with Hi-DPI ON, then dragged the ball and created an imageset with only 1x image, changed Hi-DPI to OFF and the background was clear too